Top

www.GemstoneBasics.com

References > Corundum | Rubies & Sapphires
First draft: July 16th, 1997 | Last update: February 21st, 2014 | References: 1278

In order to keep the best overview, the following references were categorised according to their respective topics. Some articles may fall under multiple entries. For quick reference, click a topic in the keyword section. Clicking any section header will bring you back to the keyword section.

Keywords: Afghanistan, Asia, Asterism & Chatoyancy, Australia, Azad-Kashmir, Baddeleyite, Brazil, Burma, Cambodia, Canada, Ceylon, China, Colombia, Crystallography, Czech Republic, Fake Rough, Fluorescence, France, General, Germany, Geochemistry, Geology, Greenland, Historical Accounts, Hibonite, Imitations, Inclusions, India, Isotope Research, Jammu-Kashmir, Kashmir, Kenya, Laos, Macedonia, Madagascar, Malawi, Montana, Mozambique, Myanmar, Nepal, New Zealand, Nigeria, Origin, Padparadscha, Pakistan, Poland, Russia, Rwanda, Scotland, Slovakia, Spectroscopic Research, Sri Lanka, Structural Properties, Switzerland, Synthetics, Tajikistan, Tanzania, Thailand, Trapiche, Treatments, USA, Vietnam, Zanskar-Kashmir & Zirconolite.

General

Anonymous (2005). Gems: fancy sapphires. IDEX Magazine, Vol. 20, No. 184, pp. 142-143.

Anonymous (2011). Ruby or sapphire. Joia & Cia, Vol. 12, No. 73, p. 70.

Anonymous (2012). Fancy favorites: a love affair with rubies and sapphires. IDEX Magazine, Vol. 27, No. 262, pp. 94-99.

Anonymous (2012). Les pierres de couleur originales sont dans l'air du temps. Gold'Or, No. 6, pp. 51-52 (in French).

Brauner, M. (2012-2013). All about fancy sapphires. Indian Jeweller, Vol. 2, No. 3, pp. 107-108.

Cresbon, F., Lebrun, P., Le Cléac'h, J.-M., Notari, F., Grobron, C., & Deville, J. (2002). Corindon et Spinelles. Minéraux et Fossiles, Hors Série No. 15, Editions Cédim, Paris, 104 p. (in French).

Eppler, W.F. (1972). Seltenheiten. Deutsche Goldschmiede-Zeitung, No. 3.

Falz, E. (1939). Von Menschen und edlen Steinen. Charivar Verlag, Idar-Oberstein, 225 p. ISBN 978-3921692165.

Fryer, C.W. & Koivula, J.I. (1986). An Examination of Four Important Gems. Gems & Gemology, Vol. 22, No. 2, pp. 99-102.

Gravender, M.D. (1934). Sapphire. Gems & Gemology, Vol. 1, No. 2 (March-April), pp. 47-48.

Heady, S. (1999). Sapphires: are a girl's best friend. Chartwell Books, Edison, NJ, 96 p. ISBN 978-0785811008.

Hughes, R.W. (1990). Corundum. Butterworth Heinemann, England, 314 p. ISBN 978-0-7506-1007-0. www.ruby-sapphire.com

Hughes, R.W. (1997). Ruby & Sapphire. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Hughes, R.W. (2001). Seeing red: a guide to ruby connoisseurship. The Guide, Vol. 20, No. 6, Part 1 (November–December), pp. 4–7, 16. Also published on www.palagems.com

Hughes, R.W. (Not dated, Retrieved March 18th 2014). Ruby Buying Guide, published on www.collectorfinejewelry.com

Kelly, R. (2009). Corundum variety sapphire, ruby. Metal, Stone & Glass, Vol. 48, p. 12.

Krzemnicki, M.S. (2012). Fancy-coloured sapphires: classical gemstones with a rich colour spectrum. SSEF Facette, No. 19, pp. 6-7.

Matlins, A. (2005). Colored gemstones. The Antoinette Matlins buying guide - how to select, buy, care for & enjoy sapphires, emeralds, rubies, and other colored gems with confidence and knowledge. 3rdEd. GemStone Press, Woodstock, VT, 256 p. ISBN 978-0-943763-72-9.

Mitchell R.K. (1983). "Silk" in Sapphires From a New Source. The Journal of Gemmology, Vol. 18, No. 6, pp. 520-522.

Mumme, I.A. (1988). The world of sapphires: their occurrence, discrimination, synthesis, and valuation. Mumme Publications, Port Hacking, N.S.W., 190 p. ISBN 978-0-959306-91-0.

Newman, R. (2000). Ruby, sapphire & emerald buying guide: how to evaluate, identify, select & care for these gemstones. International Jewelry Publications, Los Angeles, 164 p. ISBN 978-0-929975-28-3.

Newman, R. (2009). The ruby, sapphire & emerald buying guide: how to identify, evaluate and select these gems. International Jewelry Publications, Los Angeles, 188 p. ISBN 978-0-929975-41-2.

Peretti, A. & Smith C.P. (1994). Letters to the Editor. The Journal of Gemmology, Vol. 24, No. 1, pp. 61-63.

Perkins, J. (2012). World of sapphires: Recognizing the rarity and beauty of multicolor corundum gems. Rock & Gem, Vol. 42, No. 10, pp. 44-49.

Robertson, S.M. (2012). Market trends: Padparadscha 1992-2012. Gem Guide: Gem Market News, Vol. 31, No. 3, p. 16.

Rutherford, R. (2010). World's largest sapphire. Midland Focus, No. 16, pp. 38-39.

Scarratt, K. (????). The identification of ruby and sapphire. GIA Symposium Proceedings, pp. 82-83.

Shigley, J.E., Laurs, B.M., Janse, A.J.A.B., Elen, S. & Dirlam, D.M. (2010). Gem localities of the 2000s. Gems & Gemology, Vol. 46, No. 3, pp. 188-216.

Shor, R. & Weldon, R. (2009). Ruby and Sapphire Production and Distribution: A Quarter Century of Change. Gems & Gemology, Vol. 45, No. 4 (Winter), pp. 236-259.

Shor, R. (2010). Ruby and sapphire markets transformed. Hong Kong Jewellery, Vol. 3, No. 125, pp. 40-42; Israel Diamonds, No. 231, pp. 54, 56-57 & www.diamonds.net

Smith, C.P. (2010). Inside sapphires. Rapaport Diamond Report, Vol. 33, No. 7, pp. 123-132.

Sweeney, B.B. (2003). Corundum Conundrum. The Australian Gemmologist, Vol. 21, p. 463.

Vogel, S. (2010). Padparadscha sapphire: the connoisseur's stone. JQ International, p. 12.

Voynick, S.M. (2007). Colorful corundum: aluminum oxide gems span the spectrum. Rock & Gem, Vol. 37, No. 5, pp. 80-84.

Ward, F. (2003). Rubies & sapphires. 4th Ed. Gem Book Publishers, Malibu, CA, 64 p. ISBN 978-1887651103.

Webster, R. (1957). Ruby and Sapphire. The Journal of Gemmology, Vol. 6, No. 3, pp. 101-146.

Weldon, R. (2001). Study in red. Professional Jeweler Archive, pp. 1-3.

Wise, R.W. (2003). Secrets of the Gem Trade - The Connoisseur's Guide to Precious Gemstones. Brunswick House Press, Lenox, Massachusetts, USA, 274 p. ISBN 0-9728223-9-9. www.secretsofthegemtrade.com

Asterism & Chatoyancy

Bratton, R.J. (1971). Precipitation and Hardening Behavior of Czochralski Star Sapphire. Journal of Applied Physics, Vol. 42, p. 211. abstract

Connellan, M. & Pozzebon, L. (1985). Asterism - The great enigma: A study of Australian star sapphires. The Australian Gemmologist, Vol. 15, No. 9 (February), pp. 295-306.

Eppler, W.F. (1958). Notes on Asterism in corundum, rose quartz and almandine garnet and chatoyancy in beryl. The Journal of Gemmology, Vol. VI, No. 5., pp. xxx-xxx.

Nassau, K. (1968). On the Cause of Asterism in Star Corundum. American Mineralogist, Vol. 53, pp. 300-305. American Mineralogist Tables of Contents

Phillips, D.S., Heuer, A.H. & Mitchell, T.E. (1980). Precipitation in Star Sapphire I. Identification of the Precipitate. Philosophical Magazine A, Vol. 42, No. 3, pp. 385-404. abstract

Phillips, D.S., Heuer, A.H. & Mitchell, T.E. (1980). Precipitation in star sapphire II. Elastic accommodation of the precipitate. Philosophical Magazine A, Vol. 42, No. 3, pp. 405-416. abstract

Phillips, D.S., Heuer, A.H. & Mitchell, T.E. (1980). Precipitation in star sapphire III. Chemical effects accompanying precipitation. Philosophical Magazine A, Vol. 42, No. 3, pp. 417-432. abstract

Pough, F.H. (1961). New Star-Stones and Their Antecedents. The Journal of Gemmology, Vol. 8, No. 1, pp. 14-20.

Saminpanya, S. (2001). Ti-Fe mineral inclusions in star sapphires from Thailand. The Australian Gemmologist, Vol. 21, No. 3, pp. 125-128.

Schmetzer, K. & Glas, M. (2001). Zwolfstrahliger Sternsaphir aus Bang-Kha-Cha, Thailand. Mineralien Magazin Lapis, Vol. 26, No. 11, pp. 40-42 (in German).

Schmetzer, K. & Kiefert, L. (1987). Investigation of a sapphire cat’s-eye from Burma. The Journal of Gemmology, Vol. 20, No. 6, pp. 346-349.

Schmetzer, K., Steinbach, M.P., Gilg, H.A. & Blake, A.R. (2015). Dual-color double stars in corundum and quartz In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 60-64. The entire publication is available on www.igc-gemmology.net

Tait, A.S. (1955). Asterism in Corundum. The Journal of Gemmology, Vol. 5, No. 2, pp. 65-72.

Crystallography

Blount, A. & Shulman, W. (1977). Twinning in Minerals. The Mineralogical Record, Vol. 8, No. 5, pp. 350-361. The Mineralogical Record Tables of Contents

Buerger, M.J. (1945). The Genesis of Twin Crystals. American Mineralogist, Vol. 30, Nos. 7/8, pp. 469-482. American Mineralogist Tables of Contents

Fake Rough

Arlabosse, J.-M. (2005). “Faux” crystal de rubis. Revue de Gemmologie, Association Française de Gemmologie, No. 153, p. 23.

Coldham, T. (2004). Sapphire in basalt fake. The Australian Gemmologist, Vol. 22, p. 171.

Delaunay, A. & Fritsch, E. (2011). Corindons synthetiques sculptes pour imiter des corindons naturels. Revue de Gemmologie, Association Française de Gemmologie, No. 178, pp. 13-16 (in French).

Fritz, E.A. & Laurs, B.M. (Eds.) (2006). Gem News International: Synthetic corundum "gem rough" in Tanzania. Gems & Gemology, Vol. 42, No. 4 (Winter), p. 282.

Kammerling, R.C. (Ed.) (1993). Gem Trade Lab Notes: Another Imitation Ruby "Crystal". Gems & Gemology, Vol. 29, No. 3 (Fall), p. 204.

Koivula, J.I. & Kammerling, R.C. (Eds.) (1989). Gem News: Synthetic corundum "crystals". Gems & Gemology, Vol. 25, No. 4 (Winter), p. 249-250.

Koivula, J.I. & Kammerling, R.C. (Eds.) (1991). Gem News International: More synthetics sold as natural ruby in Vietnam. Gems & Gemology, Vol. 27, No. 4 (Winter), p. 260.

Koivula, J.I., Kammerling, R.C. & Fritsch, E. (Eds.) (1993). Gem News: More on Vietnamese deceptions. Gems & Gemology, Vol. 29, No. 4 (Winter), pp. 289-290.

Fake Rubies & Sapphires | Imitations

Anonymous (1938). Another Star Sapphire Substitute. Gems & Gemology, Vol. 2, No. 10 (Summer), p. 168.

Anonymous (1939). "True Star". Gems & Gemology, Vol. 3, No. 3 (Fall), p. 36.

Fluorescence

Tombs, G. (1974). Synthetic-Like Fluorescence in a Natural Sapphire. The Australian Gemmologist, Vol. 12, No.3, p. 94. Reprinted in The Australian Gemmologist, Vol. 21 (2003), p. 464.

Geochemistry

Abduriyim, A. (2015). Residual pressure distribution and visualization of mineral inclusions in corundum: application of photoluminescence spectroscopy in relation to sapphires from New England, New South Wales, Australia In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 1-2. The entire publication is available on www.igc-gemmology.net

Beaton, D. & Wang, W. (2008). Lab notes: Blue sapphire, with unusually high concentrations of rare-earth elements. Gems & Gemology, Vol. 44, No. 2 (Summer), pp. 162-163.

Beran, A. & Rossman, G.A. (2006). OH in naturally occurring corundum. European Journal of Mineralogy, Vol. 18, No. 4, pp. 441–447. abstract

Bonizzoni, L., Galli, A., Spinolo, G. & Palanza, V. (2009). EDXRF quantitative analysis of chromophore chemical elements in corundum samples. Analytical and Bioanalytical Chemistry, Vol. 395, Issue 7, pp. 2021-2027. abstract + references

Boulvais, P., Fourcade, S., Moine, B., Gruau, G. & Cuney, M. (2000). Rare-earth elements distribution in granulite-facies marbles: a witness of fluid–rock interaction. Lithos, Vol. 53, pp. 117-126. abstract

Dissanayake, C.B. & Rupasinghe, M.S. (1986). The niobium and yttrium abundances in the sedimentary gem deposits of Sri Lanka. Journal of the National Sciences Council of Sri Lanka, Vol. 14, No. 1, pp. 55-74.

Dissanayake, C.B. & Rupasinghe, M.S. (1992). Application of geochemistry to exploration for gem deposits in Sri Lanka. The Journal of Gemmology, Vol. 23, No. 3, pp. 165-175.

Donovan, J.J. & Tingle, T.N. (1996). An improved mean atomic number background correction for quantitative microanalysis. Microscopy and Microanalysis, Vol. 2, No. 1, pp. 1-7.

Dubois, J. (1989). Contribution à l'identification du rubis par la mise en évidence de divers éléments à l'état de trace. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Gamage, S.J.K., Rupasinghe, M.S. & Dissanayake, C.B. (1992). Application of Rb-Sr ratios to gem exploration in the granulite belt of Sri Lanka. Journal of Geochemical Exploration, Vol. 43, Issue 3 (June), pp. 281-292. abstract

Günther, D., Frischknecht, R. & Heinrich, C. A. (1997). Capabilities of a 193nm ArF Excimer Laser for LA-ICP-MS Micro Analysis of Geological Materials. Journal of Analytical Atomic Spectrometry, Vol. 12, Issue 9, pp. 939-944. abstract

Günther, D. & Hattendorf, B. (2005). Solid sample analysis using laser ablation inductively coupled plasma mass spectrometry. TrAC Trends in Analytical Chemistry, Vol. 24, Issue 3, pp. 255-265. abstract

Hänni, H.A. & Stern, W.B. (1982). Über die Bedeutung des Gallium-Nachweises in Korunden. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 31, pp. 255-260 (in German).

Harder, H. (1969). Farbgebende Spurenelemente in den natürlichen Korunden. Neues Jahrbuch für Mineralogie, Abhandlungen, Vol. x, pp. 128-141.

Hattendorf, B., Latkoczy, C. & Günther, D. (2003). Laser ablation-ICPMS. Analytical Chemistry, Vol. 75, No. 15, pp. 341A-347A.

Peucat, J.-J., Ruffault, P., Fritsch, E., Simonet, C., Bouhnik-Le Coz, M. & Lasnier, B. (2005). Un nouvel outil géochimique de reconnaissance des saphirs bleus basaltiques et métamorphiques: le rapport Ga/Mg. Revue de Gemmologie, Association Française de Gemmologie, No. 153, pp. 8-12 (in French).

Peucat, J.J., Ruffault, P., Fritsch, E., Bouhnik-Le Coz, M., Simonet, C. & Lasnier, B. (2007). Ga/Mg ratios as a new geochemical tool to differentiate magmatic from metamorphic blue sapphires. Lithos, Vol. 98, pp. 261-274. abstract

Pouchou, J.L. & Pichoir, F. (1985). "PAP" φ(ρZ) procedure for improved quantitative microanalysis. Microbeam Analysis, Vol. 20, pp. 104-105.

Rupasinghe, M.S., Banerjee, A., Pense, J. & Dissanayke, C.B. (1983). The geochemistry of beryllium and fluorine in the gem fields of Sri Lanka. Mineralium Deposita, Vol. 19, No. 1 (January), pp. 86-93. abstract + references

Schmetzer, K. & Bank, H. (1981). Die Farbursachen und Farbe der Mineralart Korund. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 30, pp. 152-156.

Geology | Origin

Cahen, L. & Snelling, N.J. (1984). The geochronology and evolution of Africa. Clarendon Press, Oxford, 512 p. ISBN 0198575440.

Coenraads, R.R. (1992). Surface features on natural rubies and sapphires derived from volcanic provinces. The Journal of Gemmology, Vol. 23, No. 3, pp. 151-160.

Coenraads, R.R. (1992a). Sapphires and rubies associated with volcanic provinces: inclusions and surface features shed light on their origin. The Australian Gemmologist, August, pp. 70-78.

Coenraads, R.R., Sutherland, F.L. & Kinny, P.D. (1990). The Origin of sapphires: U-Pb dating of zircon inclusions sheds new light. Mineralogical Magazine, Vol. 54. pp. 113-22. Mineralogical Magazine Tables of Contents

Collins, A.S. (2000). The tectonic evolution of Madagascar: Its place in the East African Orogen. Gondwana Research, Vol. 3, No. 4, pp. 549–552.

Cooray, P.G. (1984). An introduction to the geology of Sri Lanka. 2nd Revised Edition, National Museums of Sri Lanka, Colombo, xix, 340 p. + geological map (1 : 500.000). review

Cooray, P.G. & Berger, A.R. (1980). Is the Highland-Eastern Vijayan boundary in Sri Lanka a possible mineralized belt? - A discussion. Economic Geology, Vol. 75, No. 5, pp. 774-775.

Cooray, P.G. & Kumarapeli, P.S. (1980). Corundum in biotite-sillimanite gneiss from near Polgahawela, Ceylon. Geological Magazine, Vol. 97, No. 6, pp. 480-487. abstract

Dahanayake, K. (1980). Modes of occurrence and provenance of gemstones of Sri Lanka. Mineralium Deposita, Vol. 15, Issue 1 (March), pp. 81-86. abstract + references

Dahanayake, K. & Ranasinghe, A.P. (1981). Source rocks of gem minerals: a case study from Sri Lanka. Mineralium Deposita, Vol. 16, Issue 1 (May), pp. 103-111. abstract + references

Dahanayake, K. & Ranasinghe, A.P. (1985). Geology and mineralogy of gemming terrains in Sri Lanka. Bulletin of the Geological Society of Finland, Vol. 57, Part 1-2, pp. 139-149.

Dissanayake, C.B. & Chandrajith, R. (1999). Sri Lanka–Madagascar Gondwana Linkage: Evidence for a Pan-African Mineral Belt. The Journal of Geology, Vol. 107, Issue 2 (March), pp. 223–235.

Dissanayake, C.B., Chandrajith, R. & Tobschall, H.J. (2000). The Geology, Mineralogy and Rare Element Geochemistry of the Gem Deposits of Sri Lanka. Bulletin of the Geological Society of Finland, Vol. 72, No. 1-2, pp. 1-20. Also see www.geologinenseura.fi

Draper, D.S. & Green, T.H. (1999). P-T phase relations of silicic, alkaline aluminous liquids: new results and applications to mantle melting and metasomatism. Earth and Planetary Science Letters, Vol. 170, Issue 3, pp. 255-268. abstract

Emori, K. & Kitawaki, H. (2015). Geographic origin determination of ruby and blue sapphire based on trace element analysis using LA-ICP-MS and 3D-plot In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 48-50. The entire publication is available on www.igc-gemmology.net

Fernandez, A., Huber, S., Schreurs, G., Villa, I. & Rakotondrazafy, M. (2001). Tectonic evolution of the Itremo region (central Madagascar) and implications for Gondwana assembly. International Symposium and Field Workshop on the Tectonics and Mineralization in the Arabian Shield and its Extensions, UNESCO/IGCP Project 368: Proterozoic Events in East Gondwana. King Abdualaziz University, Jeddah, Saudi Arabia, March 17–25.

Fernandez, A. & Schreurs, G. (2003). Tectonic evolution of the Proterozoic Itremo Group metasediments in central Madagascar. Geological Society of London, Special Publications, Vol. 206, pp. 381-399. abstract

Garnier, V., Giuliani, G., Ohnenstetter, D. & Schwarz, D. (2004). Saphirs & Rubis, Les gisements de corindon: classification et genese. Le Regne Mineral, No. 55, 47 p (in French).

Garnier, V., Ohnenstetter, D., Giuliani, G. & Schwarz, D. (2003). Revue des classifications des gisements de corindon. Chapitre 4, Ecole Doctorale RP2E, France (in French).

Giuliani, G., Ohnenstetter, D., Fallick, A.E., Groat, L. & Fagan, A.J. (2014). The geology and genesis of gem corundum deposits In: Groat, L.A. (Editor) Geology of gem deposits, pp. 29-112. Mineralogical Association of Canada, Short Course Series, Vol. 44, Quebec, Quebec, Canada, 405 p. ISBN 978-0-921294-54-2.

Guo, J.F., O'Reilly, S.Y. & Griffin, W.L. (1996). Corundum from basaltic terrains: an inclusion approach to the enigma. Contributions to Mineralogy and Petrology, Vol. 122, Issue 4 (January), pp. 368-386. abstract

Haas, H. (1972). Diaspore-corundum equilibrium determined by epitaxis of diaspore on corundum. American Mineralogist, Vol. 57, pp. 1375-1385. American Mineralogist Tables of Contents

Hall, A. (1996). Igneous Petrology. 2nd Edition. Longman, Harlow Essex, U.K., 551 p. ISBN 0-582-23080-2.

Handke, M.J., Tucker, R.D. & Ashwal, L. (1999). Neoproterozoic continental arc magmatism in west-central Madagascar. Geology, Vol. 27, No. 4, pp. 351–354. abstract

Hänni, H.A. (1994). Origin determination for gemstones: possibilities, restrictions and reliability. The Journal of Gemmology, Vol. 24, No. 3, pp. 139-148. Also published on www.ssef.ch

Hermann, J., Müntener, O. & Günther, D. (2001). Differentiation of Mafic Magma in a Continental Crust-to-Mantle Transition Zone. Journal of Petrology, Vol. 42, Issue 1, pp. 189-206. abstract

Hunstiger, C. (1990). Darstellung und Vergleich primärer Rubinvorkommen in metamorphen Muttergesteinen, Part I: Petrographie und Phasenpetrologie. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 38, No. 4, pp. 113-138 (in German).

Hunstiger, C. (1990). Darstellung und Vergleich primärer Rubinvorkommen in metamorphen Muttergesteinen, Part II: Petrographie und Phasenpetrologie. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 39, No. 1, pp. 49-63 (in German).

Hunstiger, C. (1990). Darstellung und Vergleich primärer Rubinvorkommen in metamorphen Muttergesteinen, Part III: Petrographie und Phasenpetrologie. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 39, No. 2/3, pp. 121-145 (in German).

Hurai, V., Simon, K., Wiechert, U., Hoefs, J., Konečný, P., Huraiová, M., Pironon, J. & Lipka, J. (1998). Immiscible separation of metalliferous Fe/Ti-oxide melts from fractionating alkali basalt: P-T-fO2 conditions and two-liquid elemental partitioning. Contributions to Mineralogy and Petrology, Vol. 133, No. 1-2 (October), pp. 12-29. abstract

Huraiová, M., Konečný, P., Konečný, V., Simon, K. & Hurai, V. (1996). Mafic and salic igneous xenoliths in Late Tertiary alkaline basalts: Fluid inclusion and mineralogical evidence for a deepcrustal magmatic reservoir in the Western Carpathians. European Journal of Mineralogy, Vol. 8, No. 5 (October), pp. 901-916.

Irving, A.J. (1986). Polybaric magma mixing in alkali basalts and kimberlites: Evidence from corundum, zircon and ilmenite megacrysts In: Smith, C.B. (Ed.) Fourth International kimberlite Conference Extend Abstracts, Perth, Western Australia, August 11-15, 1986. Geological Society of Australia Abstracts Series, Vol. 16, p. 262.

Kane, R.E. (xxxx). Ruby and sapphire occurrences around the world. GIA Symposium Proceedings, pp. 60-61.

Kennedy, W.Q. (1964). The structural differentiation of Africa in the Pan-African (± 500 Ma) tectonic episode. Annual Report - Research Institute of African Geology, University of Leeds, Vol. 8, pp. 48-49.

Kievlenko, E.Y. (2003). Geology of Gems. English Ed., Ocean Pictures Ltd., Littleton, CO, USA, 432 p. + 32 p. plates. ISBN 978-5900395258.

Koltsov, A.B. (2002). Ruby-bearing metasomatites in marbles: conditions and numerical model of the formation. Experiments in Geosciences, Vol. 10, pp. 94-96.

Kornprobst, J. (2002). Metamorphic Rocks and Their Geodynamic Significance - A Petrological Handbook. Kluwer Academic Publishers, Dordrecht, The Netherlands, 208 p. ISBN 1-4020-0893-7.

Kröner, A. (1980). Pan-African crustal evolution. Episodes, 2, pp. 3-8.

Kröner, A. (1984). Late Precambrian plate tectonics and orogeny: a need to redefine the term Pan-African. African Geology, Vol. 5, pp. 23-28.

Kröner, A. (1991). African linkage of Precambrian Sri Lanka. Geologische Rundschau, Vol. 80, pp. 429-40. abstract + references

Lacroix, A. (1922b). Sur une syénite à corindon et sillimanite formée par endomorphisme de granite. Comptes Rendus de l’Académie des Sciences, Vol. 174. pp. 899-904.

Larsen, E.S. (1928). A hydrothermal origin of corundum and albitite bodies. Economic Geology, Vol. 23, No. 4, pp. 398-433.

Levinson, A.A. & Cook, F.A. (1994). Gem Corundum in Alkali Basalt Origin and Occurrence. Gems & Gemology, Vol. 30, No. 4 (Winter), pp. 253-262.

London, D. (1986a). Magmatic-hydrothermal transition in the Tanco rare-element pegmatite: evidence from fluid inclusions and phase-equilibrium experiments. American Mineralogist, Vol. 71, pp. 376-395. American Mineralogist Tables of Contents

Munasinghe, T. & Dissanayake, C.B. (1980). Is the Highland-eastern Vijayan boundary in Sri Lanka a possible mineralized belt? - Reply. Economic Geology, Vol. 75, No. 5 (August), pp. 775-777.

Nédélec, A., Stephens, W.E. & Fallick, A.E. (1995). The Panafrican stratoid granites of Madagascar: Alkaline magmatism in a Post-collisional extensional setting. Journal of Petrology, Vol. 36, Issue 5, pp. 1367–1391.

Owen, J.V. & Greenough, J.D. (1991). An empirical sapphirine-spinel Mg-Fe exchange thermometer and its application to high-grade xenoliths in the Pope Harbour dyke, Nova Scotia, Canada. Lithos, Vol. 26, pp. 317-32. abstract

Pain, C.F. (1983). Geomorphology of the Barrington Tops area, New South Wales. The Journal of the Geological Society of Australia, Vol. 30, pp. 187-94. abstract

Paquette, J-L., Nédelec, A., Monie, B. & Rakotondrazafy, M. (1993). U-Pb single zircon Pb-evaporation and Sm-Nd dating of the SE Madagascar domain: a prevailing Pan-African event. Terra Abstracts, Vol. 5, pp. 393.

Peucat, J.-J., Ruffault, P., Fritsch, E., Simonet, C., Bouhnik-Le Coz, M. & Lasnier, B. (2005). Un nouvel outil géochimique de reconnaissance des saphirs bleus basaltiques et métamorphiques: le rapport Ga/Mg. Revue de Gemmologie, Association Française de Gemmologie, No. 153, pp. 8-12 (in French).

Powell, C.A. & Conaghan, P.J. (1973). Plate tectonics and the Himalayas. Earth and Planetary Science Letters, Vol. 20, pp. 1-20. abstract

Schmetzer, K., Bernhardt, H.-J. & Gübelin, E.J. (2003). An anorthite-ruby-pargasite-picotite assemblage. The Journal of Gemmology, Vol. 28, No. 7, pp. 385-391. abstract

Schwarz, D. (1998). Aus Basalten, Marmoren und Pegmatiten. Spezielle Ursachen form ten in der Erdkruste edle Rubine und Saphire In: Glas, M. (Editor) Rubin, Saphir, Korund: schan, hart, selten, kostbar. extraLapis, No. 15, pp. 5-9. Christian Weise Verlag, München, Germany, 96 p. ISBN 9-921656-45-1 (in German).

Shipley, R.M. (1935). Gem Nomenclature in Europe. Gems & Gemology, Vol. 1, No. 10 (July-August), pp. 293-294.

Simonet, C. (1997). Géologie des Gisements de Saphirs. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes, 82 p. (in French). Published on www.gemnantes.fr

Silva, K.K.M.W. & Siriwardena, C.H.E.R. (1988). Geology and the origin of the corundum-bearing skarn at Bakamuna, Sri Lanka. Mineralium Deposita, Vol. 23, Issue 3 (July), pp. 186-190. abstract + references

Sorkhabi, R.B. & Stump, E. (1993). Rise of the Himalaya: A geochronologic approach. GSA Today, Vol. 3, No. 4, pp. 85, 88-92.

Sutherland, F.L. & Schwarz, D. (2001). Origin of gem corundums from basaltic fields. The Australian Gemmologist, First Quarter, Vol. 21, pp. 30-33.

Sutherland, F.L. & Schwarz, D. (2003). Origin of gem corundums. The Journal of Gemmology, Vol. 28, No. 8, pp. 473-452.

Sutherland, F.L., Hoskin, P.W.O., Fanning, C.M. & Coenraads, R.R. (1998a). Models of corundum origin from alkali basaltic terrains: a reappraisal. Contributions to Mineralogy and Petrology, Vol. 133, Issue 4 (December), pp. 356-372. abstract

Sutherland, F.L., Schwarz, D., Jobbins, E.A., Coenraads, R.R. & Webb, G. (1998b). Distinctive gem corundum suites from discrete basalt fields, a comparative study of Barrington, Australia, and West Pailin, Cambodia, gem fields. The Journal of Gemmology, Vol. 26, No. 2, pp. 65-85.

Upton, B.G.J., Aspen, P. & Chapman, N. (1983). The upper mantle and deep crust beneath the British Isles: evidence from inclusions in volcanic rocks. Journal of the Geological Society, Vol. 140, No. 1, pp. 105-121. abstract

Upton, B.G.J., Finch, A.A. & Słaby, E. (2009). Megacrysts and salic xenoliths in Scottish alkali basalts: derivatives of deep crustal intrusions and small-melt fractions from the upper mantle. Mineralogical Magazine, Vol. 73, No. 6, pp. 943-956. abstract Mineralogical Magazine Tables of Contents

Upton, B.G.J., Hinton, R.W., Aspen, P., Pinch, A. & Valley, J.W. (1999). Megacrysts and associated xenoliths: Evidence for migration of geochemically enriched melts in the upper mantle beneath Scotland. Journal of Petrology. Vol. 40, Issue 6, pp. 935-956. abstract

Vernon, R.H. & Clarke, G.L. (2011). Principles of Metamorphic Petrology. 3rd Printing. Cambridge University Press, New York, N.Y., U.S.A., 446 p. ISBN 978-0-521-87178-5.

Wade, S. (2002). Origin blues. Colored Stone, Vol. 15, No. 3, pp. 38-39.

White, J.S. (1979). Boehmite Exsolution in Corundum. American Mineralogist, Vol. 64, Nos. 11/12, November-December, pp. 1300-1302. American Mineralogist Tables of Contents

Windley, B.F., Razafiniparany, A., Razakamanana, T. & Ackermand, D. (1994). Tectonic framework of the Precambrian of Madagascar and its Gondwana connections: a review and reappraisal. Geologische Rundschau, Vol. 83, pp. 642-59.

Zaw, K., Sutherland, L., Graham, I. & McGee, B. (2008). Dating zircon inclusions in gem corundums from placer deposits, as a guide to their origin. 33rd International Geological Congress, Oslo, August 6-14th. abstract

Hibonite, Baddeleyite & Zirconolite

Bayliss, R., Mazzi, F., Munno, R. & White, T.J. (1989). Mineral nomenclature: Zirconolite. Mineralogical Magazine, Vol. 53, pp. 565-9. Mineralogical Magazine Tables of Contents

Curien, H., Guillemin, C., Orcel, J. & Sternberg M. (1956). La hibonite, nouvelle espèce minérale. Comptes Rendus de l’Académie des Sciences, Paris, Vol. 242, pp. 2845–2847.

de Hoog, J.C.M. & van Bergen, M.J. (1997). Notes on the chemical composition of zirconolite with thorutite inclusions from Walaweduwa, Sri Lanka. Mineralogical Magazine, Vol. 61, pp. 721-725. Mineralogical Magazine Tables of Contents

Fleischer, M. (1957). New mineral names. American Mineralogist, Vol. 42, pp. 117–124. American Mineralogist Tables of Contents

Floss, C., El Goresy, A., Zinner, E., Palme, H., Weckwerth, G. & Rammensee, W. (1998). Corundum-bearing residues produced through the evaporation of natural and synthetic hibonite. Meteoritics & Planetary Science, Vol. 33, No. 2, pp. 191-206.

Hainschwang, T., Notari, F., Massi, L., Armbruster, T., Rondeau, B., Fritsch, E. & Nagashima, M. (2010). Hibonite: A New Gem Mineral. Gems & Gemology, Vol. 46, No. 2 (Summer), pp. 135–138.

Hofmeister, A.M., Wokenpa, B. & Lockok, A.J. (2004). Spectroscopy and structure of hibonite, grossite, and CaAl2O4: Implications for astronomical environments. Geochimica et Cosmochimica Acta, Vol. 68, pp. 4485–4503.

Holtstam, D. (1996). Iron in hibonite: a spectroscopic study. Physics and Chemistry of Minerals, Vol. 23, Issue 7, pp. 452-460. abstract + references

Ihinger, P.D., Stolper, E.M. (1986). The color of meteoritic hibonite: an indicator of oxygen fugacity. Earth and Planetary Science Letters, Vol. 78, Issue 1, pp. 67-79. abstract

Maaskant P., Coolen, J.J.M.M.M. & Burke E.A.J. (1980). Hibonite and coexisting zoisite and clinozoisite in a calc-silicate granulite from southern Tanzania. Mineralogical Magazine, Vol. 43, pp. 995–1003. Mineralogical Magazine Tables of Contents

Purtscheller, F. & Tessadri, R. (1985). Zirconolite and baddeleyite from metacarbonates of the Oetztal-Stubai complex (northern Tyrol, Austria). Mineralogical Magazine, Vol. 49, pp. 523-29. Mineralogical Magazine Tables of Contents

Rafaranalisoa, E. (1968). Données nouvelles sue la Hibonite (CaAl12019) de Madagascar. These, Académie de Paris, Université Pierre et Marie Curie.

Rajesh, V.J., Arai, S., Santosh, M. & Tamura, A. (2010). LREE-rich hibonite in ultrapotassic rocks in southern India. Lithos, Vol. 115, pp. 40–50. abstract

Rakotondrazafy, A.F.M. (1995). La hibonite (CaAl12O19) du sud-est de Madagascar. Caractères et modalités de formation dans les skarns à thorianite du faciès granulite. Unpublished PhD Thesis. University Toulouse III-Antananarivo, 195 p.

Rakotondrazafy, A.F.M., Moine, B. & Cuney, M. (1996). Mode of formation of hibonite (CaAl12O19) within the U-Th skarns from the granulites of SE Madagascar. Contributions to Mineralogy and Petrology, Vol. 123, pp. 190-201. abstract

Roberts, W.L., Campbell, T.J. & Rapp, G.R., Jr. (1989). Encyclopedia of Minerals. 2nd Ed. Van Nostrand Reinhold, New York, 979 p. ISBN 0-442-27681-8.

Schwarz, D., Petsch, E.J. & Kanis, J. (1996). Sapphires from the Andranondambo region, Madagascar. Gems & Gemology, Vol. 32, No. 2, pp. 80–99.

Simon, S.B., Davis, A.M., Grossman, L. & McKeegan, K.D. (2002). A hibonite-corundum inclusion from Murchison: A first-generation condensate from the solar nebula. Meteoritics & Planetary Science, Vol. 37, No. 4, pp. 533–548.

Ulianov, A., Kalt, A. & Pettke, T. (2005). Hibonite, Ca(Al,Cr,Ti,Si,Mg,Fe2+)12O19, in granulite xenoliths from the Chyulu Hills volcanic field, Kenya. European Journal of Mineralogy, Vol. 17, pp. 357–366. abstract

Williams, C.T. & Giere, R. (1996). Zirconolite: a review of localities world-wide, and a compilation of its chemical compositions. Bulletin of the Natural History Museum Geology, Vol. 52, No. 1, pp. 1-24.

Historical Accounts

Azziz, A. (1942). The imperial treasury of the Indian Mughals. Private publication, Lahore, India. Reprinted in 1972 by Idarah-i Adabiyat-i Delli, Jayyad Press, Delhi, India, 572 p.

Ball, V. (2001). Travels in India by Jean-Baptiste Tavernier. Translated from the original French edition of 1676 by Jean-Baptiste Tavernier with a biographical sketch of the Author, Notes, Appendices, etc. 2nd Edition, Edited by William Crooke, 2 Vols., Munshiram Manoharlal Publishers, New Delhi, India, Vol. 1 - 399 p. ISBN 81-215-0683-2; Vol. 2 - 335 p. ISBN 81-215-0684-0. Set - ISBN 81-215-0682-4.

Bretschneider, E. (1910). Precious stones of the Mohammedans In: Mediaeval researches from Eastern Asiatic sources. Vol. 1: Fragments towards the knowledge of the geography and history of central and western Asia from the 13th to 17th century. Reprinted in 2015 by Forgotten Books, 350 p. ISBN 978-1330401026.

de Mely, F. (1902). Les lapidaires de l’Antiquité et du Moyen Age Vol. 1: Les lapidaires chinois, 524 p.; Vol. 2: Les lapidaires grecs, 374 p. Ernest Leroux, Paris (translated in French).

Eichholz, D.E. (1962). Natural History, Volume X: Books 36-37. Translated from the original edition by Pliny the Elder. Harvard University Press, Cambridge, MA, U.S.A., 362 p.

Eichholz, D.E. (1965). Theophrastus De Lapidibus. Edited with introduction, translation and commentary. Oxford University Press Clarendon Press, Oxford, U.K., viii + 141 p.

Ferrier, J.P. (1857). Caravan journeys and wanderings in Persia, Afghanistan, Turkistan, and Beloochistan; with historical notices of the countries lying between Russia and India. Translated by William Jesse, edited by H.D. Seymour M.P.. 2nd Edition. John Murray, London, U.K.

Finot, L. (1896). Les Lapidaires Indiens. Librairie Emile Bouillon, Paris, 281 p. (in French).

Fortenbaugh, W.W., Huby, P.M., Sharples, R.W. & Gutas, D. (1992). Theophrastus of Eresus. Sources for His Life, Writings, Thought and Influence. Vol. 1: Life, Writings, Various Reports, Logic, Physics, Metaphysics, Theology, Mathematics; Vol. 2: Psychology, Human Physiology, Living Creatures, Botany, Ethics, Religion, Politics, Rhetoric and Poetics, Music, Miscellanea. Philosophia Antiqua, Vol. 54. Brill Open Books, Leiden, The Netherlands, viii + 708 p. ISBN 9789004094406.

Huda, S.N.A. (1998). Arab roots of gemology: Ahmad ibn Yusuf Al Tifaschi's Best Thoughts on the Best Stones. Scarecrow Press, Lanham, Md, U.S.A. | London, U.K., 271 p. ISBN 0-8108-3294-1.

Lane-Poole, S. (1903). Mediaeval India under Muhammedan Rule, A.D. 712-1764. T. Fisher Unwin London. Reprinted in 1982 by Haskell House Publishers Inc., U.S. 449 p. ISBN 9789004094406.

Meen, V.B. & Tushingham, A.D. (1969). The crown jewels of Iran. University of Toronto Press, Toronto, Canada, 159 p. ISBN 978-0802015198.

Rawlingson, H.G. (1912). Bactria. The History of a forgotten Empire. Probstain & C°, London, U.K. Reprinted on October 4, 2013 by Westholme Publishing, Yardley, PA, U.S.A. 208 p. ISBN 978-1594161865.

Said, H.M. (Editor) (1989). The book most Comprehensive in Knowledge on Precious Stones: al-Biruni’s Book on Mineralogy (Kitab al-jamahir fi marifat al-jawahir) by Muhammad ibn Ahmad al-Biruni. Natural Sciences No. 66, Pakistan Hijra Council, Islamabad, Pakistan, 355 p. ISBN 978-9698016289.

Sarma, S.R. (2005). Thakkura Pheru’s Rayanaparikkha. A Medieval Prakrit Text on Gemmology. Translated from the original text by Thakkura Pheru. Dominant Publishers & Distributors, India, 321 p.

Tagore, S.M. (1879). Mani-Mala. A treatise on gems. Reprinted in 2010 by Kessinger Publishing, 542 p. ISBN 978-1165061907.

Tarn, W.W. (1951). The Greeks in Bactria and India. Reprinted in 2010 by Cambridge University Press, 600 p. ISBN 9781108009416.

Unger, M.F. (2006). The New Unger's Bible Dictionary. New revised & updated edition by Harrison, R.K., Vos, H.F. & Barber, C.J. Moody Publishers, Chicago, IL, U.S.A., 1424 p. ISBN 978-0802490667.

Vidal-Naquet, P. (Editor) (1984). Histoire d’Alexandre. L’anabase d’Alexandre le Grand - l’Inde. Translated by Savinel, P., after "Flavius Arrien entre deux mondes". Collection Arguments. Les Editions de Miniut, Paris, France, 384 p. ISBN 2707306738 (in French). summary + reviews

Visser, Ph.C. (1926). Naar onbekend Midden-Azië. Tusschen Kara-Korum en Hindu-Kush. Nijgh & Van Ditmar's Uitgevers Maatschappij, Rotterdam, The Netherlands, 253 p. (in Dutch).

Ward, G. (1983). The Maharadjas. Treasures of the world. Stonehenge Press, Chicago, U.S.A., 176 p. ISBN 978-0867060225.

Wojtilla, G. (1973). Indian precious stones in the ancient east and west. Acta Orientalia Scientiarum Hungaricae. Vol. 27, No. 2, pp. 211-224.

Identification Tools: Structural Properties

Eppler, W.F. (1962). Fire Marks on Genuine Sapphire. The Journal of Gemmology, Vol. 8, No, 5, pp. 167-170.

Kiefert, L. & Schmetzer, K. (1991a). The microscopic determination of structural properties for the characterization of optical uniaxial natural and synthetic gemstones, Part 1: General considerations and description of the methods. The Journal of Gemmology, Vol. 22, No. 6, pp. 344-354. excerpt

Kiefert, L. & Schmetzer, K. (1991b). The microscopic determination of structural properties for the characterization of optical uniaxial natural and synthetic gemstones, Part 2: Examples for the applicability of structural features for the distinction of natural and synthetic sapphire, ruby, amethyst and citrine. The Journal of Gemmology, Vol. 22, pp. 471-82.

Inclusions

Anonymous (1941). Andersons Theory of the Cause of Silk Supported. Gems & Gemology, Vol. 3, No. 11 (Fall), p. 168.

Audéon, G. (1991). Le saphir et ses inclusions. Etude particulière des inclusions des saphirs du « Bleu du Voyage ». Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Brewster, D. (1827). Notice Respecting the Existence of the New Fluid in a Large Cavity in a Specimen of Sapphire. The Edinburgh Journal of Science, Vol. 6, pp. 155-156.

Choudhary, G. (2008). Gem news international: A sapphire with en echelon inclusions. Gems & Gemology, Vol. 44, No. 2 (Summer), pp. 180-181.

Elmaleh, E., Karampelas, S., Schmidt, S.T. & Galster, F. (2015). Zircon inclusions in blue sapphires In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 51-52. The entire publication is available on www.igc-gemmology.net

Eppler, W.F. (1972). Needles in Corundum other than Rutile. The Journal of Gemmology, Vol. 13, No. 2, pp. 41-44.

Feather, R.C. (1997). Inclusion of the month in a star sapphire. The Lapidary Journal, Vol. 51, No. 1, p. 12.

Gübelin, E.J. (1942). Local Peculiarities of Sapphires, Part 1. Gems & Gemology, Vol. 4, No. 3 (Fall), pp. 34-39.

Gübelin, E.J. (1942). Local Peculiarities of Sapphires, Part 2. Gems & Gemology. Vol. 4, No. 4 (Winter), pp. 50-54.

Gübelin, E.J. (1943). Local Peculiarities of Sapphires, Part 3. Gems & Gemology, Vol. 4, No. 5 (Spring), pp. 66-69.

Gübelin, E.J. (1983). The Precious Corundums Ruby and Sapphire In: Internal World of Gemstones. Documents from Space and Time, pp. 112-136. 3rd edition. ABC Edition, Zürich, Switzerland, 234 p. ISBN 3-85504-030-3.
Note: 1st Edition (1973). Innenwelt der Edelsteine. Urkunde aus Raum und Zeit. ABC Edition, Zürich, Switzerland, 233 p. ISBN 3-85504-030-3 (in German; ISBN checked in the original copies).

Gübelin, E.J. & Koivula, J.I. (1997). Ruby and Sapphire and their Inclusions In: Photoatlas of Inclusions in Gemstones, pp. 324-361. 3rd revised edition. ABC Edition, Zürich, Switzerland, 532 p., ISBN 3-85504-095-8.

Gübelin, E.J. & Koivula, J.I. (2008). Inclusions in Major Commercial Gems: Ruby and Sapphire In: Photoatlas of Inclusions in Gemstones. Volume 3, pp. 53-353. Opinio Publishers, Basel, Switzerland, 672 p., ISBN 3-03999-029-2.

Hughes, R.W. (2007). Following the silk road: rutile silk in corundum. Spectra, pp. 4-5 and on www.ruby-sapphire.com

Koivula, J.I. (1980). Fluid inclusions: hidden trouble for the jeweler and lapidary. Gems & Gemology, Vol. 16, No. 8, pp. 273-276.

Koivula, J.I. (1980). Carbon dioxide as a fluid inclusion. Gems & Gemology, Vol. 16, No. 12, pp. 386-390.

Koivula, J.I. (1986). Carbon dioxide fluid inclusions as proof of natural-colored corundum. Gems & Gemology, Vol. 22, No. 3, pp. 152-155.

Koivula, J.I. (2001). The Role of Secondary Fluid Inclusions in Detecting Heat Treatment, published on www.gia.edu

Koivula, J.I. & Tannous, M. (2002). Spinel in Heat-Treated Blue Sapphire. Gems & Gemology, Vol. 38, No. 1 (Spring), p. 84.

Liddicoat, R.T. (1974). Incredible Inclusions in a Ruby. Gems & Gemology, Vol. 14, No. 10, pp. 313-314.

Liddicoat, R.T. (1976). Inclusions in Natural Ruby. Gems & Gemology, Vol. 15, No. 6, pp. 170-171.

Moncorgé, P. (1991). « Le Bleu du Voyage »: Etude descriptive en vidéo professionnelle des inclusions des saphirs naturels et synthétiques bleus. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Risling, M. (1977). The Diagnostic Value of Inclusions, Part 2: The Diagnostic Inclusions of Ruby and Sapphire. The Canadian Gemmologist, Vol. 1, No. 4, pp. 2-7.

Schmetzer, K. & Medenbach, O. (1988). Examination of three-phase inclusions in colourless, yellow, and blue sapphires from Sri Lanka. Gems & Gemology, Vol. 24, No. 2 (Summer), pp. 107-11.

Sun, T.T. (1987). Structural Aspects of Fingerprint Inclusions in Corundum. The Australian Gemmologist, Vol. 16, No. 5, pp. 188-190.

Würner, G. & Fricke, A. (1984). Fluid Inclusions in Corundum from a Contact Metamorphic Xenolith of the Quaternary Wehr Volcano (East Eifel, Germany). Neues Jahrbuch fur Mineralogie Monatshefte, No. 1, January, pp. 39-47.

Isotope Research

Baker, J.A., Macpherson, C.G., Menzies, M.A., Thirlwall, M.F., Al-Kadasi M. & Mattey D. (2000). Resolving crustal and mantle contributions to continental flood volcanism, Yemen: constraints from mineral oxygen isotope data. Journal of Petrology, Vol. 41, Issue 12, pp. 1805-1820. abstract

Baksheev, I.A., Ustinov, V.I., Dolgova, O.S., Balitsky, V.S. & Ekimenkova I.A. (2006). Oxygen isotopic composition as indicator for the genesis of corundum. Herald of the Department of Earth Sciences RAS. Informational Bulletin of the Annual Seminar of Experimental Mineralogy, Petrology and Geochemistry, Vol. 1, No. 24.

Berg, R.B., Gammons, C.H. & Arehart, G.B. (2008). Preliminary Oxygen Isotope Values for Montana Sapphires. Technical Session 193: Mineralogy/Crystallography; Petrology, Experimental; Igneous; Metamorphic (Posters),Monday, 6 October 2008. Geological Society of America Abstracts with Programs, Vol. 40, No. 6, p. 254. abstract

Boulvais, P., Fourcade, S., Gruau, G., Moine, B. & Cuney, M. (1998). Persistence of pre-metamorphic C and O isotopic signatures in marbles subject to Pan-African granulite-facies metamorphism and U-Th mineralization (Tranomaro, Southeast Madagascar). Chemical Geology, Vol. 150, pp. 247-262.

Eiler, J.M., Farley, K.A., Valley, J.W., Hauri, E., Craig, H., Hart, S.R. & Stolper, E.M. (1997). Oxygen isotope variations in ocean island basalt phenocrysts. Geochimica et Cosmochimica Acta, Vol. 61, Issue 11, pp. 2281-2293. abstract

Faure, G. (1986). Principles of Isotope Geology. 2nd Edition. Wiley, New York, 608 p. ISBN 978-0471864127.

Giuliani, G., Cheilletz, A. & Vidal, Ph. (1995b). La datation isotopique des gemmes. Analysis Magazine, Vol. 23, No. 1, pp. M34-M37 (in French). abstract

Giuliani, G., Fallick, A.E., Garnier, V., France-Lanord, C., Ohnenstetter, D. & Schwarz, D. (2005). Oxygen isotope composition as a tracer for the origins of rubies and sapphires. Geology, Vol. 33, No. 4, pp. 249-252. abstract

Giuliani, G., Fallick, A.E., Garnier, V., France-Lanord, C., Ohnenstetter, D. & Schwarz, D. (2005). Les isotopes de l’oxygène, un traceur de l’origine gèologique des rubis et saphirs. Revue de Gemmologie, Association Française de Gemmologie, No. 152 (June), pp. 9-11 (in French).

Giuliani, G., Fallick, A.E., Ohnenstetter, D. & Pegere G. (2009). Oxygen isotopes composition of sapphires from the French Massif Central: implications for the origin of gem corundum in basaltic fields. Mineralium Deposita, Vol. 44, No. 2 (February), pp. 221-231. abstract + references

Giuliani, G., Fallick, A.E., Rakotondrazafy, A.F.M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, Th., R akotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, Ch., Schwarz, D., Mercier, A., Ratrimo, V. & Ralison, B. (2007a). Oxygen isotope systematic of gem corundum deposits in Madagascar: relevance for their geological origin. Mineralium Deposita, Vol. 42, Issue 3, pp. 251-270. abstract + references

Giuliani, G., Ohnenstetter, D., Rakotondrazafy, M., Fallick, A.E., Rakotosamizanany, S., Andriamamonjy, A., Ralantoarison, Th., Razanatseheno, M., Dunaigre Ch. & Schwarz, D. (2007b). Les gisements de corundums gemmes de Madagascar. Revue de Gemmologie, Association Française de Gemmologie No. 159, pp. 14-28 (in French).

Keulen, N. & Kalvig, P. (2013). Fingerprinting of corundum (ruby) from Fiskenæsset, West Greenland. GEUS. Geological Survey of Denmark and Greenland Bulletin, Vol. 28, pp. 53–56.

Kyser, T.K. (1986). Stable isotope variations in the mantle. Reviews in Mineralogy and Geochemistry, Vol. 16, No. 1, pp. 141-164.

Milisenda, C.C., Liew, I.C., Hofmann, A.W. & Kröner, A. (1988). Isotopic mapping of age provinces in Precambrian high-grade terrains: Sri Lanka. Journal of Geology, Vol. 96, pp. 608-15. abstract

Milisenda, C.C., Lim, T.C., Hofmann, A.W. & Köhler, H. (1994). Nd isotopic mapping of the Sri Lanka basement: update, and additional constraints from Sr isotopes. Precambrian Research, Vol. 66, pp. 95-110. abstract

Sharp, Z.D. (1990). A laser-based microanalytical method for the in situ determination of oxygen isotopes ratios in silicates and oxides. Geochimica et Cosmochimica Acta, Vol. 54, Issue 5, pp. 1353-1357. abstract

Sheppard, S.M.F. (1986). Characterization and isotopic variations in natural waters. Reviews in Mineralogy and Geochemistry, Vol. 16, No. 1, pp. 165-183.

Sutherland, F.L., Zaw, K., Meffre, S., Giuliani, G., Fallick, A.E., Graham, I.T. & Webb, G.B. (2009). Gem-corundum megacrysts from east Australian basalt fields: trace elements, oxygen isotopes and origins. Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia, Vol. 56, No. 7, pp. 1003-1022. abstract

Vysotsky, S.V., Yakovenko, V.V., Ignat’ev, A.V. & Karabtsov, A.A. (2009). The Oxygen Isotopic Composition as an Indicator of the Genesis of “Basaltic” Corundum. Russian Journal of Pacific Geology, Vol. 3, No. 1, pp. 64–68.

Yui, T.F., Zaw, K. & Limkatrun, P. (2003). Oxygen isotope composition of the Denchai sapphire, Thailand; a clue to its enigmatic origin. Lithos, Vol. 67, pp. 153-161. abstract

Yui T.F., Wu, C.M., Limtrakun, P., Sricharn, W. & Boonsoong, A. (2006). Oxygen isotope studies on placer sapphire and ruby in the Chanthaburi-Trat alkali basaltic gemfield, Thailand. Lithos, Vol. 86, pp. 197-211. abstract

Yui, T.-F., Zaw, K. & Wu, C.-M. (2008). A preliminary stable isotope study on Mogok Ruby, Myanmar In: Graham, I.T., Zaw, K. & Cook, N.J. (Eds.) Ore Geology Reviews, Special Issue - The Genesis of Gem Deposits, Vol. 34, Issues 1–2, pp. 192-199. abstract

Localities

Afghanistan

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 277-278. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Bowersox, G.W. (1985). A Status Report on Gemstones from Afghanistan. Gems & Gemology, Vol. 21, No. 4 (Winter), pp. 192-204. www.gems-afghan.com

Bowersox, G.W. & Chamberlin, B.E. (1995). Gemstones of Afghanistan. Geoscience Press, Tucson, Arizona, U.S.A., 220 p. ISBN 978-0945005193. www.gems-afghan.com

Bowersox, G.W., Foord, E.E., Laurs, B.M., Shigley, J.E. & Smith, C.P. (2000). Ruby and Sapphire from Jegdalek, Afghanistan. Gems & Gemology, Vol. 36, No. 2 (Summer), pp. 110-126. www.gems-afghan.com

Debon, F., Afzali, H., Le Fort, P. & Sonet, J. (1987). Major intrusive stages in Afghanistan: typology, age and geodynamic setting. Geologische Rundschau, Vol. 76, No. 1, pp. 245-264. abstract + references

Griesbach, C.L. (1886). Afghan and Persian field notes. Records of the Geological Survey of India, Vol. 19, Pt. 1, pp. 48-65.

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1994). The rubies and spinels of Afghanistan: A brief history. The Journal of Gemmology, Vol. 24, No. 4, pp. 256-267.

Hughes, R.W. (1997). Afghanistan/Tajikistan In: Ruby & Sapphire, pp. 279-288. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 978-0964509764. www.ruby-sapphire.com

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Orlov, G.A., Tsabolov, G.S., Eriomcnko, G.K., Zhdan, A.V., Matveev, P.S. & Ghawari, S.A. (1974). Report by the Jegdalek Crew on the Work in 1973-74. Department of Geological and Mineral Survey, Kabul.

Pardieu, V. & Soubiraa, G. (2006). From Kashmir to Pamir, Summer 2006: Gemological expedition report to ruby, emerald and spinel mining areas in Central Asia - Part 2: Afghanistan: Land of beautiful gems and unique people on www.fieldgemology.org

Pardieu, V., Thirangoon, K. & Lomthong, P. (2011). Lab Notes: Beryllium and tungsten-bearing sapphires from Afghanistan. Gems & Gemology, Vol. 47, No. 1 (Spring), pp. 53-54.

Rossovsky, L.N. (1980). Mestorozhdeniya dragotsennykh kamney Afghanistana (Gemstone deposits of Afghanistan). Geologiya Rudnykh Mestorozhdenii (Geology of Ore Deposits), Vol. 22, No. 3, pp. 74-88 (in Russian).

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Shareq, A., Chmyriov, V.M., Stazhilo-Alekseev, K., Doronov, V.I., Gannon, P.J., Lubemov, B.K., Kafarskiy, A.K., Malyarov, E.P. & Rossovsky, L.N. (1977). Mineral Resources of Afghanistan, 2nd Ed. United Nations Development Program, AFG/74/012, 419 p.

Asia

Davis, D.W. & Barr, S.M. (1995). U-Pb dating of 1-10 Ma mantle zircon megacrysts from South East Asia. Geological Association of Canada/Mineralogical Association of Canada Annual Meeting. Victoria, Vol. 20, A23.

Garnier, V.(2003). Les gisements de rubis associes aux marbres de l'Asie Centrale et du Sud Est: Genese et caracterisation isotopique. Thèse de doctorat (Ph.D. thesis), INPL de Nancy, soutenue le 31 octobre 2003, 371 p (in French).

Giuliani, G., Ohnenstetter, D. & Garnier, V. (2003). En Asie, pas de rubis sans marbre ni sel … on IRD (In French).

Garnier, V., Maluski, H., Giuliani, G., Ohnenstetter, D. and Schwarz, D. (2006). Ar-Ar and U-Pb ages of marble-hosted ruby deposits from central and southeast Asia. Canadian Journal of Earth Sciences, Vol. 43, No. 4, pp. 509-532. abstract

Garnier, V., Giuliani, G., Ohnenstetter, D., Fallick, A.E., Dubessy, Banks, J.D. Hoàng Quang, V., Lhomme, T., Maluski, H., Pêcher, A., Bakhsh, K.A., Pham Van Long, Phan Trong, T. & Schwarz, D. (2008). Marble-hosted ruby deposits from Central and Southeast Asia: Towards a new genetic model In: Graham, I.T., Zaw, K. & Cook, N.J. (Eds.) Ore Geology Reviews, Special Issue - The Genesis of Gem Deposits, Vol. 34, No. 1-2, pp. 169-191. abstract references

Visser, Ph. C. (1926). Naar onbekend Midden-Azië. Tusschen Kara-Korum en Hindu-Kush. Nijgh & Van Ditmar's Uitgevers Maatschappij, Rotterdam, The Netherlands, 253 p. (in Dutch).

Australia

Anderson, O. (1967). A prospector's guide to the Anakie sapphire fields. Gems & Gemology, Vol. 12, No. 6 (Summer), pp. 173-178, 192.

Anderson, O. (1971). A century of sapphire mining. The Australian Gemmologist, Vol. 11, No. 3 (August), pp. 11-20.

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 278-279, 291. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Birch, W.D. (1986). Gemstones of the Beechworth area. The Australian Gemmologist, Vol. 16, No. 3 (August), pp. 101-106.

Broughton, P.L. (1979). Economic geology of the Anakie sapphire mining district, Queensland. The Journal of Gemmology, Vol. 16, No. 5, pp. 318-337.

Broughton, P.L. (1980). The gemmiferous gravels of the Fraser and Reddistone Creeks, Inverell-Glen Innes District, New South Wales. The Journal of Gemmology, Vol. 17, No. 2, pp. 95-118.

Brown, G. & Kelly, S.M.B. (1989). Australian colour-changing sapphire. The Australian Gemmologist, Vol. 17, No. 2, pp. 47-48.

Coenraads, R.R. (1994). Evaluation of Potential Sapphire Source Rocks within the Catchments of Kings Plains Creek and Swan Brook, near Inverell, New South Wales. Records of the Australian Museum, Vol. 46, pp. 5-24.

Coldham, T.S. (1973). Sapphire mining in northern New South Wales. The Australian Gemmologist, Vol 11, No. 10 (May), pp. 14-19.

Coldham, T.S. (1985). Sapphires from Australia. Gems & Gemology, Vol. 21, No. 3 (Fall), pp. 130-146.

Coldham, T.S. (1992). The Australian sapphire industry. The Australian Gemmologist, Vol 18, No. 4 (November), pp. 104-107.

Federman, D. (2007). Gem profile: Tasmanian sapphire. Modern Jeweler, Vol. 106, No. 1, pp. 41-42.

Guo, J.F., O'Reilly, S.Y. & Griffin, W.L. (1992). Origin of sapphire in eastern Australian basalts: inferred from inclusion studies. The Geological Society of Australia Abstracts, Vol. 32, pp. 219-220.

Graham, I., Sutherland, F.L., Zaw, K., Nechaeve, V. & Khanchuke, A. (2008). Advances in our understanding of the gem corundum deposits of the West Pacific continental margins intraplate basaltic fields In: Graham, I.T., Zaw, K. & Cook, N.J. (Eds.) Ore Geology Reviews, Special Issue - The Genesis of Gem Deposits, Vol. 34, Issues 1–2, pp. 200–215. abstract

Grundmann, G. & Morteani, G. (1998). Alexandrite, emerald, ruby, sapphire and topaz in a biotite-phlogopite fels from Poona, Cue District, Western Australia. The Australian Gemmologist, Vol. 20, No. 4 (October-December), pp. 159-167.

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1997). Australia In: Ruby & Sapphire, pp. 288-299. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 978-0964509764. www.ruby-sapphire.com

Johnson, R.W. (1989). Intraplate volcanism in Eastern Australia and New Zealand. Cambride University Press, Cambridge, 444 p. ISBN 0-521-38083-9.

Krosch, N.J. & Cooper, W. (1991). Queensland sapphire: Part 1. The Australian Gemmologist, Vol. 17, No. 11 (August), pp. 460-464.

Krosch, N.J. & Cooper, W. (1991). Queensland sapphire: Part 2. The Australian Gemmologist, Vol. 17, No. 12 (November), pp. 511-515.

MacNevin, A.A. (1973). Sapphire mining in New South Wales. The Australian Gemmologist, Vol. 11, No. 11 (August), pp. 14-16.

MacNevin, A.A. & Holmes, G.G. (1980). Gemstones. The Mineral Industry of New South Wales. Geological Survey of New South Wales. Vol. 18, 2nd Ed., 119 p.

Males, P.A. (1976). Ruby corundum from the Harts Range, NT. The Australian Gemmologist, Vol. 12, No. 10 (May), pp. 310-312.

McGee, B.M. (2005). Characteristics and origin of the Weldborough sapphire, NE Tasmania. Thesis, School of Earth Sciences, University of Tasmania, 118 p.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Moon, A.R. & Phillips, M.R. (1984). An electron microscope study of exsolved phases in natural black Australian sapphire. Micron and Microscopica Acta, Vol. 15, Issue 3, pp. 143-146. abstract

Oakes, G.M., Barron, L.M. & Lishmund, S.R. (1996). Alkali basalts and associated volcaniclastic rocks as a source of sapphire in eastern Australia In: Sutherland, F.L. (Ed.) Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia - Special Issue: The Nicholas Rock Symposium: Alkaline Rocks and Their Associated Mineralisation, Vol. 43, No. 3, pp. 289-298. abstract

O'Reilly, S.Y. & Zhang, M. (1995). Geochemical characteristics of lava-field basalts from eastern Australia and inferred sources: connections with the sub-continental lithospheric mantle. Contributions to Mineralogy and Petrology, Vol. 121, pp. 148-70. abstract + references

Oughton, J.H. (1973). New England rubies. The Australian Gemmologist, Vol 11, No. 10 (May), p. 27.

Pecover, S.R. (2001). Geology and sapphire resources of the Kew Valley sapphire mine, Inverell, NSW, Australia. Australian Sapphire Corporation, Ourimbah, NSW.

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Sutherland, L. (1991). Gemstones of the Southern Continents, pp. 108-114. Reed Books, Sydney, Australia, 256 p. ISBN 0-7301-0272-6.

Sutherland, F.L. (1996). Alkaline rocks and gemstones, Australia: a review and synthesis In: Sutherland, F.L. (Ed.) Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia - Special Issue: The Nicholas Rock Symposium: Alkaline Rocks and Their Associated Mineralisation, Vol. 43, No. 3, pp. 323-343. abstract

Sutherland, F.L. (2007). Australian sapphires and rubies. Rocks & Minerals, Vol. 82, No. 2, pp. 116-125.

Sutherland, F.L. & Abduriyim, A. (2009). Geographic typing of gem corundum: a test case from Australia. The Journal of Gemmology, Vol. 31, No. 5-8, pp. 203-210.

Sutherland, F.L., Barron, B.J. & Webb, G. (1993). Barrington volcano - repeated gemstone eruptions (zircon, sapphire and ruby) at the edge of the Sydney Basin In: Diesel, C.F.K. (Ed.) Twenty-Seventh Newcastle Symposium on Advances in the Study of the Sydney Basin. University of Newcastle, Department of Geology, Publication 545, pp. 137-44.

Sutherland, F.L. & Coenraads, R.R. (1996). An unusual ruby-sapphire-sapphirine-spinel assemblage from the Tertiary Barrington volcanic province, New South Wales, Australia. Mineralogical Magazine, Vol. 60, pp. 623-638. abstract

Sutherland, F.L. & Fanning, C.M. (1996). Magmatism below Barrington volcano, NSW: Based on basalt and zircon megacryst dating. Geological Society of Australia Abstract Series, Vol. 41, p. 426.

Sutherland, F.L. & Fanning, C.M. (2001). Gem-bearing basaltic volcanism, Barrington, New South Wales: Cenozoic evolution, based on basalt K–Ar ages and zircon fission track and U–Pb isotope dating. Australian Journal of Earth Sciences, Vol. 48, Issue 2 (April), pp. 221–237. abstract

Sutherland, F.L. & Graham, I.T. (2003). Geology of Barrington Tops Plateau: Its Rock, Minerals and Gemstones, New South Wales, Australia. The Australian Museum Society, Sydney, 58 p. ISBN 0-646-42695-8.

Sutherland, F.L., Graham, I.T., Pogson, R.E., Schwarz, D., Webb, G., Coenraads, R.R., Fanning, C.M., Hollis, J.D. & Allen, T.C. (2002). The Tumbarumba basaltic gem field, New South Wales: in relation to sapphire-ruby deposits of eastern Australia. Records of the Australian Museum, Vol. 54, Issue 2, pp. 215-248.

Sutherland, F.L., Zaw, K., Meffre, S., Giuliani, G., Fallick, A.E., Graham, I.T. & Webb, G.B. (2009). Gem-corundum megacrysts from east Australian basalt fields: trace elements, oxygen isotopes and origins. Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia, Vol. 56, No. 7, pp. 1003-1022. abstract

Webb, G. (1997). Gemmological features of rubies and sapphires from the Barrington volcano, eastern Australia. The Australian Gemmologist, Vol. 19, No. 11, pp. 471-475.

Ru, S.X. (1992). A note on corundum veinlets in ruby from China and Australia. The Australian Gemmologist, Vol. 18, No. 1 (February), pp. 22-23.

Zaw, K., Sutherland, F.L., Dellapasqua, F., C. G. Ryan, C.G., Yui, T.-F., Mernagh, T.P. & Duncan, D. (2006). Contrasts in gem corundum characteristics, eastern Australian basaltic fields: trace elements, fluid/melt inclusions and oxygen isotopes. Mineralogical Magazine, Vol. 70, No. 6, pp. 669-687. abstract Mineralogical Magazine Tables of Contents

Brazil

Cornejo, C. & Bartorelli, A. (2009). Corundum In: Minerals & Precious Stones of Brazil, pp. 274-275. Solaris Cultural Publications, São Paulo, Brazil, 704 p. ISBN 978-85-89820-08-0.

Eppler, W.F. (1964). Sapphire from Rio Coxim, Mato Grosso, Brazil. The Journal of Gemmology, Vol. 9, No. 6, pp. 199-204.

Epstein, D.S., Brennan, W. & Mennes, J.C. (1994). The Indaia Sapphire Deposits of Minas Gerais, Brazil. Gems & Gemology, Vol. 30, No. 1 (Spring), pp. 24-32.

Freitas-Silva, F.H., Gaspar, J.C., Andrade, G.F. & Luiz F. W. Kitajima, L.F.W. (1998). Low pressure corundum crystallization in the Peixe Alkaline Complex (Tocantins, Brazil) as evidenced by fluid inclusion characterization In: Congresso Brasileiro de Geologia, 40, Belo Horizonte, 1997 Anais... Belo Horizonte, SBG, p. 174.

Henn, U. (1986). Saphire aus Nigeria und von Sta Terezinha de Goias, Brazilien. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 35, No. 1-2, pp. 15-19.

Henn, U., Bank, H. & ... (1986). Saphire von Indaia, Minas Gerais, Brasilien. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 43, No. 3-4, pp. 111-116.

Hughes, R.W. (1997). Brazil In: Ruby & Sapphire, pp. 299-300. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 978-0964509764. www.ruby-sapphire.com

Kitajima, L.F.W., Ruiz, J., Gehrels, G. & Gaspar, J.C. (2001). Uranium-Lead ages of zircon megacrysts and zircon included in corundum from Peixe alkaline complex. III Simposio Sudamericano de Geologia Isotopica, 2001, Pucón.

Koivula, J.I. & Kammerling, R.C. (1990). Gem News: New World sapphires. Gems & Gemology, Vol. 26, No. 1 (Spring), pp. 101-102.

Liccardo, A., Oliveira, E.F. & Jordt-Evangelista, H. (2005). Rubi e Safiras de Minas Gerais, Brasil. Revista Escola de Minas, Vol. 58, No. 3, pp. 237-245 (in Portuguese with an abstract in English). Revista Escola de Minas

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Rossi, P., Andrade, G.F. & , Gaspar, J.C. (1997). The Peixe (Tocantins, Brazil) Mesoproterozoic corundum-bearing syenite pegmatite complex age considerations on its origin and regional In: Congresso Brasileiro de Geologia, 39, Salvador, 1996 Anais... Salvador, SBG, Vol. 6, pp. 426-428.

Sauer, J.R. (1982). Brazil - Paradise of Gemstones, p. 124. Private publication, Rio de Janeiro, Brazil, 135 p. No ISBN.

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Sutherland, L. (1991). Gemstones of the Southern Continents, pp. 121-122. Reed Books, Sydney, Australia, 256 p. ISBN 0-7301-0272-6.

Burma (Myanmar)

Ali, S.H. & Dickinson DeLeon, S. (Not dated; Retrieved December 29th 2013). Case Study: Myanmar's Rubies on Gems and the Environment

Anonymous (Not dated; Retrieved December 29th 2013). Burma Gem Sales and Statistics. Palagems Reflective Index on www.palagems.com

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 269-274, 286. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Eckert, P. (2013). U.S. updates Myanmar sanctions to maintain gem import ban, published Wednesday, August 7th 2013 on www.reuters.com

Ehrman, M. (1957). Gem Mining in Burma. Gems & Gemology, Vol. 9, No. 1 (Spring), pp. 3-30. Also published on www.palagems.com

Ehrman, M. (Not dated; Retrieved December 20th 2013). The Ruby Mines of Mogok. From an Unfinished Manuscript by Martin Ehrman - Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5a Chapter 5b Chapter 6 and a photo album on www.palagems.com

Ehrman, M. (1957). Burma, The Mineral Utopia - Part 1. The Lapidary Journal, Vol. 6, No. 3 (August), pp. xx-xx. Also published on www.palagems.com

Ehrman, M. (1957). Burma, The Mineral Utopia - Part 2. The Lapidary Journal, Vol. 6, No. 4 (October), pp. xx-xx. Also published on www.palagems.com

Ehrman, M. (1957). Burma, The Mineral Utopia - Part 3. The Lapidary Journal, Vol. 6, No. 5 (December), pp. xx-xx. Also published on www.palagems.com

Enriquez, C.M. (1930). Fire-Hearted Pebbles from Burma. Asia Magazine, Vol. 30, No. 10 (October), pp. 722–725, 733. Also published on www.palagems.com

Eppler, W.F. (1959). Einige interessante Einschlüsse in Rubin von Birma. Diebeners Gold-schmiede-Jahrbuch (in German).

Eppler W.F. (1976). Negative Crystals in Ruby from Burma. The Journal of Gemmology, Vol. 15, No. 1, pp. 1-5.

Garnier, V., Ohnenstetter, D., Giuliani, G., blanc, P. & Schwarz, D. (2002). Trace-element contents and cathodoluminescence of "trapiche" rubies from Mong Hsu, Myanmar (Burma): geological significance, mineralogy and petrology. Mineralogy and Petrology, Vol. 76, Issue 3-4 (November), pp. 179-193. abstract

Peretti, A., Schmetzer, K., Bernhardt, H.-J. & Mouawad, F. (1995). Rubies from Mong Hsu. Gems & Gemology, Vol. 31, No. 1 (Spring), pp. 2-26.

Gordon, R. (1888). On the ruby mines near Mogok, Burma (+ Map). Proceedings of the Royal Geographical Society, Vol. 10, No. 5, pp. 261-275. Edward Stanford, Londen. excerpt

Gübelin, E.J. (1940). Differences Between Burma and Siam Rubies. Gems & Gemology, Vol. 3, No. 5 (Spring), pp. 69-72.

Gübelin, E.J. (1965). The ruby mines of Mogok. The Journal of Gemmology, Vol. 9, No. 12, pp. 411-425.

Gübelin, E.J. (1967). Birmanie, Pays des Pagodes. Editions Silva, Zurich, 131 p (in French).

Gübelin, E.J. (1977). Im Tal der Rubine. Lapis, Vol. 2, No. 8, pp. 19-26 (in German).

Halford-Watkins, J.F. (1934). Cornflower Blue Not Best Color. Gems & Gemology, Vol. 1, No. 3 (May-June), p. 71.

Halford-Watkins, J.F. (1934). Adamantine-Spar Corundum. Gems & Gemology, Vol. 1, No. 3 (May-June), p. 82.

Harlow, G.E. (2000). The Mogok Stone Tract, Myanmar: Minerals with complex parageneses. Minerals and Museums 4 Conference Melbourne, Australia, December, 2000. abstract

Henn, U. & Bank, H. (1996). Trapichartige Korunde aus Myanmar. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 45, No. x, pp. 23-34 (in German).

Hlaing, U T. & Win, K.K. (2008). Gem news international: Ruby and other gems from Nanyaseik (Namya), Myanmar. Gems & Gemology, Vol. 44, No. 3 (Fall), pp. 270-271.

Hlaing, U T. (1993). Möng Hsu ruby update. The Australian Gemmologist, Vol. 18, No. 5 (February), pp. 157-160.

Hlaing, U T. (1993). Shan states sapphires. The Australian Gemmologist, Vol. 18, No. 5 (February), p. 164.

Hlaing, U T. (1995). New extension of Möng Hsu ruby deposit. The Australian Gemmologist, Vol. 19, No. 2 (April-June), p. 51.

Hlaing, U T. (1997). Corundum (ruby) from the Karen State, Myanmar: a note. The Australian Gemmologist, Vol. 19, No. 12 (October-December), pp. 507-508.

Hlaing, U T. (1999). Möng Hsu ruby revisited - Some further data. The Australian Gemmologist, Vol. 20, No. 7 (July-September), pp. 289-292.

Hlaing, U T. (2000). Gemological Abstracts: Möng Hsu ruby revisited - Some further data. Gems & Gemology, Vol. 36, No. 1 (Spring), pp. 89-90.

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1997). Burma (Myanmar) In: Ruby & Sapphire, pp. 300-348. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 978-0964509764. Also published on www.ruby-sapphire.com

Hughes, R.W. (2012). The Book of Ruby & Sapphire. From an Unpublished Manuscript by J.F. Halford-Watkins, 1936. 1st Ed., 1st Printing. RWH Publishing. ISBN 0-9645097-0-2. www.ruby-sapphire.com

Hughes, R.W. & Emmett, J.L. (2004). Fluxed Up: The Fracture Healing of Ruby on www.ruby-sapphire.com

Hughes, R.W. & Galibert, O. (1998). Foreign Affairs. The Australian Gemmologist, Vol. 20, No. 2, pp. 70–74. Also published on www.ruby-sapphire.com

Hughes, R.W. & Win, U H. (1995). Burmese Sapphire Giants. The Journal of Gemmology, Vol. 24, No. 8, pp. 551–561. Also published on www.ruby-sapphire.com

Htun, H. & Harlow, G.E. (Not dated; Retrieved December 2nd 2013). Identifying Sources among Burmese Rubies. Research Project, Dept. Earth and Planetary Sciences, American Museum of Natural History, New York, NY, US on www.amnh.org

Iyer, L.A.N. (2007). The Geology and Gem-stones of the Mogok Stone Tract, Burma. Reprint from the 1953 edition of Vol. 82, Memoirs of the Geological Survey India. White Lotus Co., Bangkok, 100 p. ISBN 978-974-480-123-4.

Kammerling, R.C., Scarratt, K., Bosshart, G., Jobbins, E.A., Kane, R.E., Gübelin, E.J. & Levinson, A.A. (1994). Myanmar and its gems — an update. The Journal of Gemmology, Vol. 24, No. 1, pp. 3-28 / 40.

Kane, R.E. & Kammerling, R.C. (1992). Status of Ruby and Sapphire Mining in the Mogok Stone Tract. Gems & Gemology, Vol. 28, No. 3 (Fall), pp. 152-174.

Keller, P.C. (1983). The Rubies of Burma: A Review of the Mogok Stone Tract. Gems & Gemology, Vol. 19, No. 4 (Winter), pp. 209-219.

McDougall, D. (2010). The curse of the blood rubies: Inside Burma's brutal gem trade, published September 18th 2010 on www.dailymail.co.uk

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Mitchell, A., Chung, S.-L., Oo, T., Lin, T.-H. & Hung, C.-H. (2012). Zircon U–Pb ages in Myanmar: Magmatic–metamorphic events and the closure of a neo-Tethys ocean?. Journal of Asian Earth Sciences, Vol. 56, pp. 1–23. abstract

Mullenmeister, V.H.-J., Schwaben, M. & Zang, J. (1995). Ein Trapiche Rubin aus Myanmar (Burma). Mineralien Magazin Lapis, Vol. 20, No. 12, p. 50 (in German).

Peretti, A. (2003). Namya Rubies. Contributions to Gemology, No. 2, pp. 9-14. Gemresearch Swisslab, Lucerne, 36 p. ISBN 978-3-9523359-3-2. Also published on www.gemresearch.ch

Peretti, A. & Günther, D. (2003). Spinel from Namya. Contributions to Gemology, No. 2, pp. 15-18. Gemresearch Swisslab, Lucerne, 36 p. ISBN 978-3-9523359-3-2. Also published on www.gemresearch.ch

Peretti, A. & Kanpraphai, A. (2003). Expedition to the Namya Mines in Northern Burma. Contributions to Gemology, No. 2, pp. 1-8. Gemresearch Swisslab, Lucerne, 36 p. ISBN 978-3-9523359-3-2. Also published on www.gemresearch.ch

Peretti, A. (1993). Foreign substances in Mong Hsu rubies. JewelSiam, Vol. 4, No. 5, p. 42.

Peretti, A. & Mouawad, F. (1994). Fluorine inclusions in Mong Hsu ruby. JewelSiam, Vol. 5, No. 4, pp. 136-137.

Peretti, A., Mullis, J. & Mouawad, F. (1996). The role of fluorine in the formation of colour zoning in rubies from Mong Hsu, Myanmar (Burma). The Journal of Gemmology, Vol. 25, No. 1, pp. 3-19.

Peretti, A., Schmetzer, K., Bernhardt, H.-J. & Mouawad, F. (1995). Rubies from Mong Hsu. Gems & Gemology, Vol. 31, No. 1, pp. 2-26. more info + links on www.gemresearch.ch

Samuels, S.K. (2003). Burma Ruby: A History of Mogok’s Rubies from Antiquity to the Present. S.K.S. Enterprises, Tucson, AZ, USA, 254 p. review

Sanchez, J.L., Osipowicz, T., Tang, S.M., Tay, T.S. & Win, T.T. (1997). Micro-PIXE analysis of trace-element concentrations of natural rubies from different locations in Myanmar. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 130, Issues 1-4, pp. 682-686. abstract

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Schlüssel, R. (2002). Mogok - Eine Reise durch Burma zu den schonsten Rubinen und Saphiren der Welt. Christian Weise Verlag, München, 280 p. ISBN 978-3-921656-60-0 (in German).

Scott, W.H. (1936). The Ruby Mines of Burma. Gems & Gemology, Vol. 2, No. 1 (Spring), pp. 3-6.

Scott, W.H. (1936). The Ruby Mines of Burma. Gems & Gemology, Vol. 2, No. 2 (Summer), pp. 31-34.

Searle, M.P., Noble, S.R., Cottle, J.M., Waters, D.J., Mitchell, A.H.G., Hlaing, T. & HorstWood, M.S.A. (2007). Tectonic evolution of the Mogok metamorphic belt, Burma (Myanmar) constrained by U-Th-Pb dating of metamorphic and magmatic rocks. Tectonics, Vol. 26, Issue 3, pp. 1-24. abstract

Smith, C.P. & Surdez, N. (1994). The Mong Hsu ruby: A new type of Burmese ruby. Jewel Siam, Vol. 4, No. 6, pp. 82-89.

Suwa, Y. (1993-2000). Gemstones - Quality & Value. Sekai Bunka Publishing, Inc., Tokyo, Japan. 3 Vols; Vol. 1 - 143 p., ISBN 4-418-99902-7; Vol. 2 - 144 p., ISBN 4-418-02902-8; Vol. 3 - 144 p., ISBN 4-418-01902-2.

Themelis, T. (2000). Mogok - Valley of Rubies & Sapphires. Millenium Ed. A & T Publishing, 270 p. ISBN 0-940965-20-8.

Themelis, T. (2008). Gems & Mines of Mogok. Special Limited Illustrated Ed. A & T Publishing, 352 p. ISBN 0-940965-30-5.

Thu, K. (2007). The Igneous Rocks of the Mogok Stone Tract - Their Distributions, Petrography, Petrochemistry, Sequence, Geochronology & Economic Geology - Chapters 1 & 2. Ph.D. Dissertation, Dept. of Geology, University of Yangon, Myanmar Chapter 3a Chapter 3b Chapter 4 Chapters 5 & 6 Chapters 7 & 8 on www.palagems.com

Wise, R.W. (Not dated; Retrieved January 29th 2013). Burma Dreams: Impressions 1999, published on www.rwwise.com. Also see www.secretsofthegemtrade.com

Wise, R.W. (Not dated; Retrieved January 29th 2013). Burma Ruby: The Boss is Back, published on www.rwwise.com. Also see www.secretsofthegemtrade.com

Yui, T.-F., Zaw, K. & Wu, C.-M. (2008). A preliminary stable isotope study on Mogok Ruby, Myanmar In: Graham, I.T., Zaw, K. & Cook, N.J. (Eds.) Ore Geology Reviews, Special Issue - The Genesis of Gem Deposits, Vol. 34, Issues 1–2, pp. 192-199. abstract

Cambodia

Ali, S.H. & Dickinson DeLeon, S. (Not dated; Retrieved December 21st 2013). Case Study: Cambodia's Gemstones on Gems and the Environment

Auk, S. (2013). Le gisement de saphirs de Païlin (Cambodge). Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Berrangé, J.P. & Jobbins, E.A. (1976). The Geology, Gemmology, Mining Methods and Economic Potential of the Pailin Ruby and Sapphire Gem-field, Khmer Republic. Institute of Geological Sciences, Report No. 35, 32 p. + 3 maps.

Carbonnel, J.P., Selo, M. & ... (1973). Fission track age of the gem deposit of Pailin (Cambodia) and recent tectonics in the Indochina province. Modern Geology, Vol. 4, pp. 61-64.

Davies, E.B. (1975). Propositions for mechanized mining of the Pailin gem deposits - Khmer Republic. Unpublished report, Ministry of Overseas Development, London.

de Silva, E. (1993). Pressures on Pailin stones prompt Thai gem-miners to move to new sources. Thailand Jewellery Review, Vol. 6, No. 1 (January), pp. 44-46.

Hughes, R.W. (Not dated; Retrieved December 21st 2013). Moontown: A history of Chanthaburi, Thailand and Pailin, Cambodia on www.ruby-sapphire.com

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1992). Mining Thai, Lao & Cambodian rubies and sapphires. JewelSiam, pp. 125–133.

Hughes, R.W. (1993). I beg to differ... A reply to the question of UN sanctions against Cambodia and Thailand's past role in Southeast Asia. Thailand Jewellery Review, Vol. 6, No. 3 (March), pp. 199–202.

Hughes, R.W. (1997). Cambodia (Kampuchea) In: Ruby & Sapphire, pp. 418-453. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 978-0964509764. Also published on www.ruby-sapphire.com

Jobbins, E.A. & Berrangé, J.P. (1981). The Pailin Ruby and Sapphire Gem Field, Cambodia. The Journal of Gemmology, Vol. 17, No. 8, pp. 555-567.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Pardieu, V. (2009). Concise Field Report Volume 1: Pailin, Cambodia (Dec 2008 – Feb 2009) on www.fieldgemology.org Pailin blog GIA video

Ruzic, R.H. (1966). The gem treasures of Cambodia. The Lapidary Journal, March, p. 1648.

Smyth, H.W. (1898). Five years in Siam - From 1891 to 1896. 2 Vols., Charles Scribner's Sons, New York. Reprinted 1994, White Lotus, Bangkok, 703 p. ISBN 9748495981.

Canada

Anonymous (2008). Sapphires discovered up north. Canadian Jeweller, p. 26.

Anderson, G.M. & Cermignani, C. (1991). Mineralogical and thermodynamic constraints of the metasomatic origin of the York River nepheline gneisses, Bancroft, Ontario. Canadian Minerologist, Vol. 29, pp. 965-980.

Barlow, A.E. (1915). Corundum: Its Occurrence, Distribution, Exploitation, and Uses. Department of Mines, Government Printing Bureau, Ottawa, Canada, 377 p.

Cade, A.M., Dipple, G.M. & Groat, L.A. (2005). Geochemical study of the kimmirut sapphire occurrence, Baffin Island, Canada. Geochimica et Cosmochimica Acta Supplement, Vol. 69, Issue 10, Supplement 1, Goldschmidt Conference Abstracts 2005, p.A279. abstract

Coenraads, R.R. & Laird, J.W. (2000). The Slocan Valley sapphire deposit Nelson, British Columbia, Canada. The Australian Gemmologist, Vol. 20, No. 10 (April-June), pp. 410-415.

Goldenberg, M. (1996). 1995 Exploration of Blu Moon / Blu Starr Properties. Geological Survey Branch Assessment Reports, British Columbia, Canada, 12 p.

Hughes, R.W. (1997). Canada In: Ruby & Sapphire, p. 354. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Moyd, L.(1949). Petrology of the nepheline and corundum rocks of Southeastern Ontario. American Mineralogist, Vol. 34, pp. 736-751. American Mineralogist Tables of Contents

China

Anonymous (1991). China's ruby similar to Myanmar. Jewellery News Asia, No. 85, p. 180. www.jewellerynewsasia.com

Anonymous (1991). Ruby discovered in China is similar to Vietnamese. ICA Gazette, August, p. 11.

Bazot, N.R. & Kremkow, C. (1991). 1991 ICA world gemstone mining report. ICA Gazette, pp. 12-15.

Furui, W. (1988). The Sapphires of Penglai, Hainan Island, China. Gems & Gemology, Vol. 24, No. 3 (Fall), pp. 155-160.

Galibert, O. & Hughes, R.W. (1995). Chinese ruby & sapphire: A brief history. The Journal of Gemmology, Vol. 24, No. 7 (July), pp. 467-473.

Guo J., Wang, F. & Yakoumelos, G. (1992). Sapphire from Changle, in Shandong province, China. Gems & Gemology, Vol. 28, No. 4 (Winter), pp. 225-60.

Guobin, L. (1981). Gem minerals from China. Journal of the Gemmological Society of Japan, Vol. 8, No. 1-4, pp. 5-15.

Hughes, R.W. (1997). China In: Ruby & Sapphire, pp. 349-354. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Keller, A.S. & Fuquan, W. (1986). A survey of gemstone deposits in China. Gems & Gemology, Vol. 22, No. 1 (Spring), pp. 3-13.

Keller, A.S. & Keller, P.C. (1986). The Sapphires of Mingxi, Fujian Province, China. Gems & Gemology, Vol. 22, No. 1 (Spring), pp. 41-45.

Luan, Y.-C., Bai, F. & Liu, J.-H. (2011). Gemmological and mineralogical characteristics of magnetite in sapphire deposit from Changle, Shandong Province. Journal of Gems & Gemology, Vol. 13, No. 3. abstract

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Xian, R.S. (1992). A note on corundum veinlets in ruby from China and Australia. The Australian Gemmologist, Vol. 18, No. 1 (February), pp. 22-23.

Colombia

Duroc-Danner, J.-M. (2002). A study of Colombian corundum. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes, 217 p. Published on www.gemnantes.fr

Hughes, R.W. (1997). Colombia In: Ruby & Sapphire, pp. 354-355. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Keller, P.C., Koivula, J.I. & Jara, G. (1985). Sapphires from the Mercaderes-Rio Mayo Area, Cauca, Colombia. Gems & Gemology, Vol. 21, No. 1-2, pp. 20-25.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Sutherland, F.L., Duroc-Danner, J.-M. & Meffre, S. (2008). Age and origin of gem corundum and zircon megacrysts from the Mercaderes-Rio Mayo area, South-West Colombia, South America In: Graham, I.T., Zaw, K. & Cook, N.J. (Eds.) Ore Geology Reviews, Special Issue - The Genesis of Gem Deposits, Vol. 34, Issues 1–2, pp. 155-168. abstract

Czech Republic

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 291. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Hughes, R.W. (1997). Czech Republic In: Ruby & Sapphire, p. 355. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Malinková, P. (1999). Origin of sapphires from the Jizerska Louka alluvial deposit in North Bohemia, Czech Republic, Europe. The Australian Gemmologist, Vol. 20, No. 5, pp. 202-206.

France

Baissieres, D. (2010). Ma vallée des rubis... Viala-du-Tarn. Le Règne Minéral, Revue Française de minéralogie, No. 93 (May-June), pp. 67-70. Editions du Piat, Saint-Julien-du-Pinet, 82 p. ISBN 978-2-917-198-07-0 (in French).

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 291. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Brousse, R. & Varet, J. (1966). Les trachytes du Mont-Dore et du Cantal septentrional et leurs enclaves. Bulletin de la Societe Geologique de France, Vol. 8, pp. 246-262 (in French).

De Ascenção Guedes, R. (2010). Des histoires pour le saphir du Riou Pezzouliou. Le Règne Minéral, Revue Française de minéralogie, No. 93 (May-June), pp. 48-52. Editions du Piat, Saint-Julien-du-Pinet, 82 p. ISBN 978-2-917-198-07-0 (in French).

Fauvain, L., Ray, B., Ott d'Estevou, P., Rose, J.-E. & Mouthier, B. (2010). Les pegmatites à corindon du Col d'Urdach (Pyrénées-Atlantiques). Le Règne Minéral, Revue Française de minéralogie, No. 93 (May-June), pp. 37-39. Editions du Piat, Saint-Julien-du-Pinet, 82 p. ISBN 978-2-917-198-07-0 (in French).

Gaillou, E. (2003). Les saphirs du Massif Central: Etude minéralogique des saphirs du Sioulot, du Mont Coupet et du Menoyre. Détermination de leur origine. DEA Thesis, Nantes, 66 p (in French). Published on www.gemnantes.fr

Gaillou, E., Devouard, B., Vielzeuf, D., Boivin, P., Rochault, J., Valley, J. & Harris, C. (2010). Le Mont Coupet, Menet et Le Sioulot: trois gisements de saphirs du Massif central. Le Règne Minéral, Revue Française de minéralogie, No. 93 (May-June), pp. 28-36. Editions du Piat, Saint-Julien-du-Pinet, 82 p. ISBN 978-2-917-198-07-0 (in French).

Giuliani, G., Fallick, A.E., Ohnenstetter, D. & Pegere G. (2009). Oxygen isotopes composition of sapphires from the French Massif Central: implications for the origin of gem corundum in basaltic fields. Mineralium Deposita, Vol. 44, No. 2 (February), pp. 221-231. abstract + references

Giuliani, G., Lasnier, B., Ohnenstetter, D., Fallick, A.E. & Pegere, G. (2010). Les gisements de corindon de France. Le Règne Minéral, Revue Française de minéralogie, No. 93 (May-June), pp. 5-23. Editions du Piat, Saint-Julien-du-Pinet, 82 p. ISBN 978-2-917-198-07-0 (in French).

Hughes, R.W. (1997). France In: Ruby & Sapphire, pp. 355-356. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Medard, E., Paquette, J.-L., Devouard, B., Ricci, J., Boivin, P., Gaillou, E., Rochault, J. & Hardiagon, M. (2012). Gem sapphires and zircons from Cenozoic volcanism of the French Massif Central. 1st VolcandPark Meeting, Olot (Spain), May 21-25. Poster.

Monchoux, P., Fontan, F., De Parseval, Ph., Martin, B. & Wang, R.C. (2006). Igneous albitite dikes in orogenic lherzolites, western Pyrénées, France: a possible source for corundum and alkali feldspar xenocrysts in basaltic terranes. I. Mineralogical associations. The Canadian Mineralogist, Vol. 44, No. 4 (August), pp. 817-842. abstract The Canadian Mineralogist Tables of Contents

Paquette, J.-L. & Mergoil-Daniel J. (2009). Origin and U–Pb dating of zircon-bearing nepheline syenite xenoliths preserved in basaltic tephra (Massif Central, France). Contributions to Mineralogy and Petrology, Vol. 158, No. 2 (August), pp. 245-562. abstract + references

Périnet, F. (2010). Les saphirs des alluvions de la Loire près de Gien (Loiret). Le Règne Minéral, Revue Française de minéralogie, No. 93 (May-June), pp. 57-60. Editions du Piat, Saint-Julien-du-Pinet, 82 p. ISBN 978-2-917-198-07-0 (in French).

Perret, G. (2010). A la recherche des saphirs Auvergnats. Le Règne Minéral, Revue Française de minéralogie, No. 93 (May-June), pp. 61-66. Editions du Piat, Saint-Julien-du-Pinet, 82 p. ISBN 978-2-917-198-07-0 (in French).

Périnet, F. & Pégère, G. (2010). A la découverte du rubis de Peygerolles, Saint-Privat-du-Dragon, Haute-Loire. Le Règne Minéral, Revue Française de minéralogie, No. 93 (May-June), pp. 53-56. Editions du Piat, Saint-Julien-du-Pinet, 82 p. ISBN 978-2-917-198-07-0 (in French).

Pin, Ch., Monchoux, P., Paquette, J.-L., Azambre, B., Wang, R.C. & Martin, R.F. (2006). Igneous albitite dikes in orogenic lherzolites, western Pyrénées, France: a possible source for corundum and alkali feldspar xenocrysts in basaltic terranes. II. Geochemical and petrogenetic considerations. The Canadian Mineralogist, Vol. 44, No. 4 (August), pp. 843-856. abstract The Canadian Mineralogist Tables of Contents

Ricci, J. (2010). Caractérisation de saphirs gemmes provenant d’une nouvelle occurence en Auvergne. Unpublished master thesis, Clermont-Ferrand University (in French).

Servant, L. (2010). Les saphirs dans le bassin de Paulhaguet, entre Allier et Senouire, Haute-Loire. Le Règne Minéral, Revue Française de minéralogie, No. 93 (May-June), pp. 57-60. Editions du Piat, Saint-Julien-du-Pinet, 82 p. ISBN 978-2-917-198-07-0 (in French).

Germany

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 291. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Locker, H. (2011). Von gras bis tief-blau: Korund und Saphir aus der Eifel. Lapis, Vol. 36, No. 3, pp. 38- (in German).

Greenland

Anonymous (2011). The Aappaluttoq Deposit: The World’s next ruby mine on www.truenorthgems.com video

Anonymous (2011). True North Gems Extends Ruby Island Corundum Host by 4.7km Along Strike, published December 12th 2011 on www.marketwired.com

Choyt, M. (2009). Greenland’s Apartheid Rubies, published April 16th 2009 on www.theepochtimes.com

Geisler, R.A. (1976). The ruby deposits at Fiskenaesset, Greenland. The Canadian Gemmologist, Vol. 1, No. 2, p. 4.

Goodget, W.D. (1976). Ruby with kornerupine and associated minerals from Greenland. The Canadian Gemmologist, Vol. 1, No. 2, pp. 2-3.

Gray, R. (1976). The geology of the Fiskenaesset area. The Canadian Gemmologist, Vol. 1, No. 2, p. 5.

Gübelin, E.J. (1979). Fiskenasset Rubinvorkommen auf Grönland. Lapis, Vol. 4, No. 3, pp. 19-26 (in German).

Hughes, R.W. (1997). Greenland In: Ruby & Sapphire, p. 356. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Keulen, N. & Kalvig, P. (2013). Fingerprinting of corundum (ruby) from Fiskenæsset, West Greenland. GEUS. Geological Survey of Denmark and Greenland Bulletin, Vol. 28, pp. 53–56.

Juul-Nielsen, A. (2015). Small scale mining of rubies and pink sapphires at Fiskenaesset, Greenland In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 40-43. The entire publication is available on www.igc-gemmology.net

Rivalenti, G. (1974). A ruby corundum pegmatoid in an area near Fiskenaesset, South-West Greenland. Bollettino della Societa Geologica Italiana, Vol. 93, No. 1, pp. 23-32.

Rohtert, W. & Ritchie, M. Three Parageneses of Ruby and Pink Sapphire Discovered at Fiskenæsset, Greenland. Gems & Gemology, Vol. 42, No. 3 (Fall), p. 149-150.

Rosing, M.T., Bird, D.K. & Dymek, R.F. (1987). Hydration of corundum-bearing xenolites in the Qôrqut Granite Complex, Gothabsfjord, West Greenland. American Mineralogist, Vol. 72, pp. 29-38. American Mineralogist Tables of Contents

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Thirangoon, K. (2009; Retrieved December 26th 2013). Ruby and Pink Sapphire from Aappaluttoq, Greenland. GIA Laboratory, Bangkok Online Report on www.giathai.net

India

Bank, H. (1978). Rubine aus Alipur, Mysore (Indien). Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 27, No. xx, p. 211 (in German).

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 277. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Durlabhji, M. (1994). Update on gemstone mining in India. ICA Gazette, August, p. 4.

Fernandes, S & Joshi, V. (1995). New gem finds in Andhra Pradesh show promise. ICA Gazette, April, p. 3.

Griesbach, C.L. (1892). The geology of the Safed Koh. Records of the Geological Survey of India, Vol. 25, Pt. 2.

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (2013). India & Kashmir In: Hughes, R.W. (1997). Ruby & Sapphire, pp. 357-374. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. Also published on www.ruby-sapphire.com

Koivula, J.I., Kammerling, R.C. & Fritsch, E. (Eds.) (1993). Gem News: Update on rubies. Gems & Gemology, Vol. 29, No. 1 (Spring), pp. 60-61.

Koivula, J.I., Kammerling, R.C. & Fritsch, E. (Eds.) (1993). Gem News: Ruby in kyanite from India. Gems & Gemology, Vol. 29, No. 4 (Winter), pp. 287.

Kuriyan, V. (1993). Orissa enriches India's gem supply. JewelSiam, Vol. 4, No. 3 (June-July), pp. 80-85.

Majumdar, A.S. & Mathew, G. (2012). Distinct Ruby Suite at Sardapur, Orissa: A Spectroscopic Investigation. Journal of the Geological Society of India, Vol. 80 (November), pp. 715-722.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Panjikar, J. (2002). Comparative study of corundum from various Indian occurrences - corundum from Tamil Nadu. The Indian Gemmologist, Vol. 10, Nos. 1-2, pp. 3-8.

Panjikar, J. & Panjikar, A. (2015). Investigation into the asterism observed in the star ruby from Neriya, Karnataka, India In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 44-47. The entire publication is available on www.igc-gemmology.net

Phukan, S. (1966). Studies on inclusions in some Indian Gemstones. The Journal of Gemmology, Vol. 10, No. 1, pp. 1-7.

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Strack, E. (1993). Ruby in kyanite from India. ICA Laboratory Alert, No. 70, p. 1

Vishweswar, M. (1979). Mining pink corundums. The Lapidary Journal, November, p. 1858.

Viswanath, N. (1970). The treasure of the Moghul emperors of India. The Journal of Gemmology, Vol. 12, No. 3 (July), pp. 73-76.

Kashmir: Azad, Jammu & Zanskar

Atkinson, D. & Kothavala, R.Z. (1983). Kashmir Sapphire. Gems & Gemology, Vol. 19, No. 2 (Summer), pp. 64-76.

Atkinson, D. & Kothavala, R.Z. (1985). Kashmir-Saphir. Lapis, Vol. 10, pp. 11-22 (in German).

Ball, S.H. (1937). Sapphires. Gems & Gemology, Vol. 2, No. 8 (Winter), p. 130.

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 288-289. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Brack, J. (1991). L'epopee d'un Gemmologue Suisse au Cachmire, A la pursuite du saphir bleu, La Suisse, Mercredi 6 Mars, page 7, Genève (in French).

Brown, J.C. (1956). Sapphires of India and Kashmir. The Gemmologist, Vol. 25, No. 298, pp. 77-80.

Brown, J.C. (1956). Sapphires of India and Kashmir. The Gemmologist, Vol. 25, No. 299, pp. 97-100.

Brown, J.C. (1956). Sapphires of India and Kashmir. The Gemmologist, Vol. 25, No. 300, pp. 129-132.

Brown, G., Hamid, D. & Kelly, S.M.B. (1985). Some Information on the Kashmir Sapphire. The Australian Gemmologist, Vol. 15, No. 12, pp. 448-449.

Burton R.C. (1913). Note on a twinned crystal of hambergite from Kashmir. Records of the geological Survey of India, Vol. 43, pp. 168-172.

Coggin Brown, J. & Dey, A.K. (1955). Mineral Wealth: India, Pakistan, Bangladesh and Burma. A Guide to the Occurrence and Economics of the Useful Minerals. 2 Vols., Isha Books, Delhi, 761 p. ISBN 978-81-8205-483-7.

Delaunay, A. (2004). Détermination d’un gradient de température de formation des Saphirs du Cachemire. Master Thesis, University of Nantes, 31 p (in French).

Dèzes, P. (1999). Tectonic and Metamorphic Evolution of the Central Himalayan Domain in Southeast Zanskar (Kashmir, India). Mémoirs de Lausanne, Université de Lausanne, No. 32, 149 p (in French).

Diehl, R. & Meng, K.H. (1990). Ein gravierter Kashmir-Saphir. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 39, No. 4, pp. 193-200 (in German).

Dillon, S. (1981). Gem News: Sapphires. Gems & Gemology, Vol. 17, No. 1 (Spring), p. 57.

Dutta, S. (2012). Kashmir Sapphire Sells for Record Price. IndiaRealTime, December 11th, 2012.

Federman, D. (Not dated; Retrieved December 9th 2013). Kashmir Sapphire on www.modernjeweler.com

Garnier, V., Ohnenstetter, D. and Giuliani, G. (2004). L'aspidolite fluoree: Role des evaporites dans le genese du rubis des marbres de Nangimali (Azad-Kashmir, Pakistan). Comptes Rendus Geoscience, Vol. 336, No. 14, pp. 1245-1253. (In French with abstract in English). abstract

Gübelin, E.J. (1982). Die Edelsteinvorkommen Pakistans - 1. Die Rubine aus dem Hunzatal. Lapis Vol. 7, No. 5, pp. 19-26 (in German).

Gübelin, E.J. (1985). Kashmir sapphire. Lapis, Vol. 10, pp. 11-22.

Halford-Watkins, J.F. (1935). Kashmir sapphires. The Gemmologist, Vol. 4, No. 42, pp. 167-172.

Hänni, H.A. (1990). Ein Beitrag zu den Erkennungsmerkmalen der Kaschmir-Saphire. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 39, No. 2/3, pp. 107-120 (in German). Also published on www.ssef.ch

Hänni, H.A. (1990). A contribution to the distinguishing characteristics of sapphire from Kashmir. The Journal of Gemmology, Vol. 22, No. 2, pp. 67-75. Also published on www.ssef.ch

Hänni, H.A. (1990). A contribution to the distinguishing characteristics of sapphire from Kashmir. Additional pictures of internal characteristics completing the publication. The Journal of Gemmology, Vol. 22, April 1990, pp. 67-75, SSEF Laboratory publication, Switzerland. Also published on www.ssef.ch

Hänni, H.A. (1994). Contribution à l'étude caractéristiques distinctives des saphirs du Cachemire - Part 1. Revue de Gemmologie, Association Française de Gemmologie, No. 121, pp. 18-20. Also published on www.ssef.ch

Hänni, H.A. (1995). Contribution à l'étude caractéristiques distinctives des saphirs du Cachemire - Part 1. Revue de Gemmologie, Association Française de Gemmologie, No. 122, pp. 6-9. Also published on www.ssef.ch

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1990). A question of origin. Gemological Digest, Vol. 3, No. 1, pp. 16-32.

Hughes, R.W. & Vock, R. (2000). Blue Velvet: Kashmir Sapphires. The Professional Gemologist, Vol. 3, No. 1, pp. 2-3.

Hughes, R.W. (2013). India & Kashmir In: Hughes, R.W. (1997). Ruby & Sapphire, pp. 357-374. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. Also published on www.ruby-sapphire.com

Kane, R.E. (1997). Kashmir ruby — a preliminary report on the deposit at Nangimali, Azad Kashmir, Pakistan. Proceedings of the 26th International Gemological Congress, Sept. 27 to Oct. 3, Idar-Oberstein, Germany, pp. 28-30.

Krzemnicki, M.S. (2013). Kashmir Sapphire. SSEF Facette, No. 20, pp. 6-9. Also published on www.ssef.ch

La Touche, T.D. (1890). The sapphire mines of Kashmir. Records of the Geological Survey of India, Vol. 23, Part 2 (May), pp. 59-69. Also published on www.palagems.com

Lawrence, Walter R. (1895). The Valley of Kashmir. H. Frowde, London, 478 p.

Lydekker, L. (1883). Geology of Kashmir and Chamba. Memoirs of the Geological Survey of India, Vol. 22, pp. 335-336. review

Mallet, F.R. (1882). On Sapphires recently discovered in the north-west Himalaya. Records of the Geological Survey of India, Vol. 15, pp. 138-141.

Mallet, F.R. (1905). On the occurrence of amblygonite in Kashmir. Records of the geological Survey of India, Vol. 32, pp. 228-229.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Middlemiss, C.S. (1931). Precious and semi-precious gemstones of Jammu and Kashmir. Mineral Survey Reports, Jammu and Kashmir Government.

Okrusch, M., Bunch, T. E. & Bank, H. (1976). Paragenesis and petrogenesis of a corundum-bearing marble at Hunza (Kashmir). Mineralium Deposita, Vol. 11, No. 3, pp. 278-297. abstract + references

Pardieu, V., Thirangoon, K., Lomthong, P., Saeseaw, S., Thanachakaphad, J. & Du Toit, G. (Ongoing Research; Retrieved December 9th 2013) Sapphires Reportedly from Batakundi/Basil area. A preliminary examination and a comparison with rubies and pink sapphires from other deposits in Central Asia. GIA Laboratory, Bangkok Online Report on www.giathai.net

Peretti, A., Mullis, J. & Kundig, R. (1990). Die Kaschmir-Saphire und ihr geologisches Erinnerungsvermögen an die Entstehungsgeschichte des Himalayagebirges. Forschung und Technick, Neue Zürcher Zeitung, Vol. 187, p. 59-65 (in German).

Phukan, S. (1966). Studies on inclusions in some Indian Gemstones. The Journal of Gemmology, Vol. 10, No. 1, pp. 1-7.

Schwieger, R. (1990). Diagnostic Features and Heat Treatment of Kashmir Sapphires. Gems & Gemology, Vol. 26, No. 4 (Winter), pp. 267-280.

Shepard, C.V. (1883). Notice of corundum gems in the Himalaya region of India. American Journal of Science, Vol. 126, pp. 339-340.

Suwa, Y. (1993-2000). Gemstones - Quality & Value. Sekai Bunka Publishing, Inc., Tokyo, Japan. 3 Vols; Vol. 1 - 143 p., ISBN 4-418-99902-7; Vol. 2 - 144 p., ISBN 4-418-02902-8; Vol. 3 - 144 p., ISBN 4-418-01902-2.

Kenya

Anonymous (1998). Update on ruby output in Kenya. Jewellery News Asia, No. 170 (October), p. 63. www.jewellerynewsasia.com

Anonymous (Not dated; Retrieved December 29th 2013). JSRM (John Saul Ruby Mine) on www.swalagemtraders.com (Note: home page appears to be a dead link; some of the other pages still work, including this one).

Bank, H. (1975). Rubin-Vorkommen in Kenia. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 24, No. 2, pp. 96 (in German).

Bank, H. (1978). Edelsteine aus Kenia. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 27, No. 4 (December), pp. 185-195 (in German).

Bank, H. & Henn, U. (1989). Schleifwürdiger, transparenter blauer saphir aus Kenia. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 38, No. 2/3, pp. 105-106 (in German).

Barot, N.R. & Dr R.R. Harding, R.R. (1994). Pink sapphire from Kitui, Kenya. The Journal of Gemmology, Vol. 24, No. 3, pp. 165-172.

Barot, N.R., Flamini, A., Graziani, G. & Gübelin, E.J. (1989). Star sapphire from Kenya. The Journal of Gemmology, Vol. 21, No. 8, pp. 467-473.

Bridges, C.R. (1982). Gemstones of East Africa In: Eash, D.M. (Ed.) International Gemological Symposium - Proceedings 1982, pp. 266-275. GIA, Santa Monica, CA, USA, 567 p. ISBN 978-0873110112.

Crowningshield, R.. (1974). Developments and Highlights at GIA's Lab in New York: A First Look at Rubies from Kenya. Gems & Gemology, Vol. 14, No. 11 (Fall), pp. 334-336.

Du Bois, C. & Walsh, J. (1970). Minerals of Kenya. Bulletin 11, Geological Survey of Kenya, Nairobi, Kenya, 82 p.

Emmett, J.L. (1999). Gem News: An update on the John Saul ruby mine. Gems & Gemology, Vol. 35, No. 4 (Winter), pp. 213-215.

Hackman, B.D., Charsley, T.J., Kagasi, J., Key, R.M., Siambi, W.S. & Wilkinson, A.F. (1989). Geology of the Isiolo area: Degree Sheet 36, with Coloured 1:250,000 Geological Map and Results of Geochemical Exploration. Report 103, Ministry of Environment and Natural Resources, Mines and Geology Department, Nairobi, Kenya, 88 p.

Hughes, R.W. (1989). The inclusions of Turkana sapphires. Gemological Digest, Vol. 2, No. 4, pp. 35-36.

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1997). Kenya In: Ruby & Sapphire, pp. 374-379. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Holden, D. & Jacobson, P. (1974). Explorers lose world's richest ruby mine in Kenya in scandal. London Times, published September 29th, pp. 1-3.

Horkel, A. (1979). Geology of the Taita Hills, Report No. 88, Geological Survey of Kenya, Nairobi, Kenya, 30 p.

Keller, P.C. (1992). Gemstones of East Africa, Geoscience Press, Phoenix, AZ, USA, 144 p. ISBN 978-0945005087.

Key, R.M. & Ridgway, J. (1987). Geology of the Maralal area: degree sheet 27 with coloured 1:250 000 geological map and results of geochemical exploration, Report No. 105, Ministry of Environment and Natural Resources, Mines and Geology Department, Nairobi, Kenya, 93 p.

Key, R. & Ochieng, J. (1991). The growth of rubies in south east Kenya. The Journal of Gemmology, Vol. 22, No. 8, pp. 484-496.

Key, R. & Ochieng, J. (1991). Ruby and garnet gemstone deposits in southeast Kenya: Their genesis and recommendations for exploration In: African Mining '91, African Mining '91' conference, Harare, Zimbabwe, 10-12 June 1991. Institution of Mining and Metallurgy, 364 p., ISBN 978-1-85166-654-6. abstract + references

Key, R., Charsley, T.J., Hackman, B.D., Wilkinson, A.F. & Rundle, C.C. (1989). Superimposed Upper Proterozoic collision controlled orogenies in the Mozambique Belt of Kenya. Precambrian Research, Vol. 44, pp. 197-225. abstract

Koch, L.E. (1979). Discovery of ruby deposits in Australia and Kenya. Australian Lapidary Magazine, Vol. 15, No. 9 (April), pp. 34-35.

Koivula, J.I. (1986). Gem News: Kenyan rubies exported to Thailand. Gems & Gemology, Vol. 22, No. 4 (Winter), p. 247.

Laurs, B.M. (2008). Gem news international: Update on the John Saul Mine, Kenya. Gems & Gemology, Vol. 44, No. 3 (Fall), pp. 267-269.

Lawson, A.C. (1904). Plumasite, an oligoclase-corundum rock near Spanish Peak, California. University of California, Berkeley University of California publciations on geological sciences, 229 p.

Levitski, A.G. & Sims, D.H.R. (1997). Surface geochemical techniques for gemstone exploration at the Rockland Ruby Mine, Mangare area, SE Kenya. Journal of Geochemical Exploration, Vol. 59, pp. 87-98. abstract

Malisa, E. (1987). Geology of the Tanzanite gemstone deposits in the Lelatema area, Tanzania. Ph.D. Thesis, University of Helsinki, Annales Academiae Scientiarum Fennicae, Series A, III, Geologica-Geographica, 146, 160 p. ISBN 9789514105609.

Malisa, E. & Muhongo, S. (1990). Tectonic setting of gemstone mineralization in the Proterozoic metamorphic terrane of the Mozambique Belt of Tanzania. Precambrian Research, Vol. 46, pp. 167-176. abstract

Matheson, F.J. (1971). Geology of the Garba Tula area: degree sheet 37, NE quarter (with Coloured Geological Map). Report No. 88, Geological Survey of Kenya, Nairobi, Kenya, 30 p.

Mercier, A., Debat, P. & Saul, J.M. (1999). Exotic origin of the ruby deposits of the Mangari area in SE Kenya. Ore Geology Reviews, Vol. 14, pp. 83-104. abstract

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Mosley P. (1993). Geological evolution of the late Proterozoic “Mozambique Belt” of Kenya. Tectonophysics, Vol. 221, Issue 2 (May), pp. 223-250. abstract

Nyamai, C.M., Mathu, E.M., Opiyo-Akech, N. & Wallbrecher, E. (2003). A reappraisal of the geology, geochemistry, structures and tectonics of the Mozambique Belt in Kenya, East of the Rift System. African Journal of Science and Technology (AJST), Science and Engineering Series, Vol. 4, No. 2, pp. 51-71.

Pardieu, V. & Soubiraa, G. (2008). Kenya: A Gem Safari on www.fieldgemology.org

Pardieu, V. & Senoble, J.B. (2007). On the way to Tsavo: Prospecting for gems in the bush, visit at the "Simba" Ruby mine, Kenya on www.fieldgemology.org

Pardieu, V. & Senoble, J.B. (2007). The "Hard Rock" Ruby Mine, Mengare Swamp, Tsavo, Kenya on www.fieldgemology.org

Pardieu, V. & Senoble, J.B. (2007). The "Corby" Ruby Mine, Baringo region, Kenya on www.fieldgemology.org

Pardieu, V., Senoble, J.B., Soubiraa, G. & Rogers, M. (2007). The "Rockland" Ruby Mine, formerly known as "John Saul Mine", Mengare Swamp, Tsavo, Kenya on www.fieldgemology.org

Pardieu, V., Senoble, J.B., Soubiraa, G. & Rogers, M. (2007). The "Aqua" Ruby Mine, formerly known as "Penny Lane", Mengare Swamp, Tsavo, Kenya on www.fieldgemology.org

Pardieu, V., Senoble, J.B., Soubiraa, G. & Rogers, M. (2007). The "Equator" Ruby Mine, Mengare Swamp, Tsavo, Kenya on www.fieldgemology.org

Pardieu, V. & Senoble, J.B. (2005). An update on Ruby and Sapphire mining in South East Asia and East Africa, Summer 2005 on www.fieldgemology.org

Pohl, W. & Horkel, A. (1980). Notes on the geology and mineral resources of the Mtito Andei-Taita area. Mitteilungen der Österreichischen Geologischen Gesellschaft, Vol. , Vol. 73, pp. 135–152 (in German).

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Simonet, C. (2000). Géologie des gisements de saphir et de rubis - L'exemple de la John Saul Ruby Mine, Mangare, Kenya. Ph.D. thesis, University of Nantes, 349 p (in French).

Simonet, C., Okundi, S. & Masai, P. (2002). General setting of coloured gemstone deposits in the Mozambique belt of Kenya – Preliminary considerations In: Nyamai, C.M. & Maimba, M. (Eds.) Proceedings of the 8th and 9th Regional Conference of the Geology of Kenya, pp. 123-138. Publication of the Geological Society of Kenya, Nairobi, Kenya.

Simonet, C., Paquette, J.-L., Pin, C., Lasnier, B. & Fritsch, E. (2004). The Dusi (Garba Tula) sapphire deposit, Central Kenya - a unique Pan-African corundum-bearing monzonite. Journal of African Earth Sciences, Vol. 38, pp. 401-410. abstract abstract + references

Themelis, T. (1989). A new sapphire deposit, Turkana, Kenya. Gemological Digest, Vol.2, No.4, pp. xxx-xxx.

Laos

Bosshart, G. (1995). Sapphires and rubies from Laos. Proceedings of the 25th International Gemmological Conference, Rayong, Thailand, 23-27 October, 1995.

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1992). Mining Thai, Lao & Cambodian rubies and sapphires. Jewel-Siam, Directory 1992, pp. 125-133.

Hughes, R.W. (1997). Laos In: Ruby & Sapphire, pp. 379-380. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Hughes, R.W. (1997). Laos – Land of a Million Elephants… & Sapphires on www.ruby-sapphire.com

Hughes, R.W. (2013). Love and Hate on www.ruby-sapphire.com

Hughes, R.W. & Sersen, W.J. (1989). Bangkok Gem Market Review. Gemological Digest, Vol. 2, No. 4, pp. 43-44.

Koivula, J.I., Kammerling, R.C. & Fritsch, E. (1992). Gem News: Gemstones From Laos. Gems & Gemology, Vol. 28, No. 2 (Summer), pp. 132-133.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Ruffault, P. (2002). Les saphirs de Houi-Sai (Nord Laos). Gemmologie et géochimie des éléments traces par ICPMS à ablation laser. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Macedonia

Baric, L. (1963). Über die orientierte Verwachsung des Diaspors und des Korunds von Sivec in Mazedonien. Contributions to Mineralogy and Petrology, Vol. 9, Issue 2 (July), pp. 133-138. abstract + references

Ruzic, R.H. (1969). About our cover: 7825 ct. Jugoslavian purplish-pink ruby. The Lapidary Journal, Vol. 23 (September), p. 786.

Ruzic, R.H. (1972). Yugoslavia welcomes rockhounds, mysterious location of corundum revealed. The Lapidary Journal, Vol. 26, No. 8 (November), pp. 1230-1238.

Schiffmann, C.A. (1974). Beobachtungen an rubinen aus Prilep, Jugoslawien. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 23, No. 2, pp. 131-138.

Madagascar

Anonymous (1995). Thai Company to mine in Madagascar. ICA Gazette (April), p. 6.

Ali, S.H. & Dickinson DeLeon, S. (Not dated; Retrieved December 29th 2013). Case Study: Madagascar's Sapphires on Gems and the Environment

Ackermand, D., Windley, B.F. & Razafiniparany, A. (1989). The Precambrian mobile belt of southern Madagascar In: Daly, J.S., Cliff, R.A. & Yardley, B.W.D. (Eds.) Geological Society, Special Publication: Evolution of Metamorphic Belts, London, No. 43, pp. 293-296.

Andriamamonjy, S.A. (2006). Les corindons associés aux roches métamorphiques du Sud Ouest de Madagascar: le gisement de saphir de Zazafotsy: Caractérisation et typologie. M.Sc. Thesis, Antananarivo University, Madagascar, 103 p (in French).

Andriamarofahatra, J., De La Boisse, H. & Nicollet, C. (1990). Datation U-Pb sur monazites et zircons du dernier épisode tectonométamorphique granulitique majeur dans le Sud-Est de Madagascar. Comptes Rendues de l'Académie des Sciences, Vol. 310, pp. 1643-8 (in French).

Bank, H., Henn, U. & Milisenda, C.C. (1998). Gemological news: sapphires from Madagascar. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 47, No. 2, pp. 61-62 (in German).

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 291. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Besairie, H. (1966). Gîtes minéraux de Madagascar. Anales Géologiques de Madagascar, Fascicule 34, Tananarive, p. 437. abstract

Besairie, H. (1967). The Precambrian of Madagascar In: Rankama S. (Editor) The Precambrian. Interscience, London, pp. 133-142.

Besairie, H. (1971). Madagascar In: Baker B.H. (Editor) Tectonique de l'Afrique. UNESCO, Paris, Sciences de la Terre, Vol. 6, pp. 549-557 (in French).

Blangenois, C. (1996). Le rubis de Madagascar. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Boulvais, P., Fourcade, S., Gruau, G., Moine, B. & Cuney, M. (1998). Persistence of pre-metamorphic C and O isotopic signatures in marbles subject to Pan-African granulite-facies metamorphism and U-Th mineralization (Tranomaro, Southeast Madagascar). Chemical Geology, Vol. 150, pp. 247-262. abstract

Caen-Vachette, M. (1979). Le Précambrien de Madagascar. Radiochronométrie par isochrones Rb/Sr sur roches totales. Reviews in Geological Dynamics and Geographical Physics, Vol. 21, pp. 331-8.

Cario, P. (1989). Les ressources gemmologiques actuelles de Madagascar. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Cartier, L.E. (2009). Ruby and sapphire from Marosely, Madagascar. The Journal of Gemmology, Vol. 31, No. 5–8, pp. 171-179.

Cartier, L.E. (2011). Rubis et saphirs de Marosely, Madagascar. Revue de Gemmologie, Association Française de Gemmologie, No. 175, pp. 9-13 (in French).

Caucia, F. & Boiocchi, M. (2005). Corindone. I cromofori nei cristalli policromi di Amboarohy, Ihosy, Madagascar. Risultati deli studi microanalitici. Rivisui Mineralogica Italiana, No. 2, pp. 126-129. (In Italian, with abstracts in English & German).

Chikayama, A. (1989). Gemstones from Madagascar. 22nd International Gemmological Conference, Milan.

De Wit, M.J. (2003). Madagascar : Heads it’s a continent tails it’s an island. Annual Review of Earth and Planetary Science, Vol. 31, pp. 213-248. abstract

Dixey, F. (1960). The geology and geomorphology of Madagascar, and a comparison with Eastern Africa. Journal of the Geological Society, Vol. 116, pp. 255-268. abstract

Duclos, J. (1927). Corindon Fanovana. Archives du Service Géologique de Madagascar, B, 115 p.

Giuliani, G. (2007). Les gisements de corindons gemmes de Madagascar. Revue de Gemmologie, Association Française de Gemmologie, No. 159, pp. 14-18 (in French).

Giuliani, G., Fallick, A.E., Rakotondrazafy, A.F.M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, Th., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, Ch., Schwarz, D., Mercier, A., Ratrimo, V. & Ralison, B. (2007a). Oxygen isotope systematic of gem corundum deposits in Madagascar: relevance for their geological origin. Mineralium Deposita, Vol. 42, 251-270. abstract + references

Giuliani, G., Ohnenstetter, D., Rakotondrazafy, M., Fallick, A.E., Rakotosamizanany, S., Andriamamonjy, A., Ralantoarison, Th., Razanatseheno, M., Dunaigre Ch. & Schwarz, D. (2007b). Les gisements de corundums gemmes de Madagascar. Revue de Gemmologie, Association Française de Gemmologie No. 159, pp. 14-28 (in French).

Giuliani, G., Rakotondrazafy, M., Ohnenstetter, D., Carlier, G., Lorand, J.-P., Rondeau, B., Moine, B. & Fontant, F. (2010). Chapitre 11: Géologie et Minéralogie In: Feller, C. & Sandron, F. (Eds.) Parcours de recherche à Madagascar: l'IRD-ORSTOM et ses partenaires, Marseille, p. 295-319. ISBN 978-2-7099-1695-0 (in French). www.documentation.ird.fr

Gübelin, E.J. & Peretti, A. (1997). Sapphires from Adranondambo mine in SE Madagascar: Evidence for metasomatic skarn formation. The Journal of Gemmology, Vol. 25, No. 7, pp. 453-470.

Gübelin, E.J. & Peretti, A. (1998). Die Saphire von Andranondambo. Eine neue Edelstein-Lagerstätte auf Madgaskar. Neue Zürcher Zeitung, 15th April, No. 86, p. 65 (in German).

Hänni, H.A., Kiefert, L., Krzemnicki, M., Schmetzer, K. & Bernhardt, H.-J. (1995). The deposit and sapphires from Southern Madagascar. Proceedings of the 25th International Gemmological Conference, Rayong, Thailand.

Hänni, H.A., Milisenda, C.C. & Henn, U. (2001). Rubies from new deposits in Madagascar. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 50, No. 2, pp. 89-94 (in German).

Hughes, R.W. (1997). Madagascar In: Ruby & Sapphire, pp. 381-382. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Hughes, R.W., Pardieu, V. & Schorr, D. (2005). Sorcerers & Sapphires: A Visit to Madagascar on www.ruby-sapphire.com

Hogg, J. (2007). Madagascar's sapphire rush BBC News, November 17th 2007 on BBC News

Johnson, M.L. & Koivula, J.I. (1997). Gem Trade Lab Notes: Sapphires from northern Madagascar. Gems & Gemology, Vol. 33, No. 4 (Winter), p. 305.

Johnson, M.L. & Koivula, J.I. (1996). Gem News: Update on Madagascar sapphires. Gems and Gemology, Vol. 32, No. 3 (Fall), p. 217-218.

Kammerling, R.C., Koivula, J.I. & Fritsch, E. (Eds.) (1995). Gem News: Sapphires from Madagascar. Gems & Gemology, Vol. 31, No. 2 (Summer), pp. 132-133.

Kiefert, L., Schmetzer, K., Krzemnicki, M.S., Bernhardt, H.-J. & Hänni, H.A. (1996). Sapphires from Andranondambo area, Madagascar. The Journal of Gemmology, Vol. 25, No. 3, pp. 185-209.

Koivula, J.I., Kammerling, R.C. & Fritsch, E. (Eds.) (1992). Gem News: Sapphires from Madagascar. Gems & Gemology, Vol. 38, No. 3 (Fall), pp. 203-204.

Lacroix, A. (1912). Un voyage au pays des béryls (Madagascar). La Géographie, Vol. 26, No. 5, pp. 285–296 (in French).

Lacroix, A. (1913). A trip to Madagascar, the country of beryls. Annual Report of the Smithsonian Institution, pp. 371–382 (in French).

Lacroix, A. (1921). Les pierres de Madagascar. Gemmes, Pierres d'Ornementation, Pierres d'Industrie. Editions de la Revue Politique et Litéraire (Revue Bleue) et de la Revue Scientifique, Paris, 59 p (in French).

Lacroix, A. (1922, 1923). Minéralogie de Madagascar. Société d’Editions Géographiques, Maritimes et Coloniales, Augustin Challamel, Paris, 3 vols.; Vol. I: Géologie, Minéralogie descriptive, 624 pp.; Vol. II: Minéralogie appliquée, Lithologie, 694 pp.; Vol. III: Lithologie, Appendice, Index Géographique, 450 p. (in French).

Lacroix, A. (1941). Les gisements de phlogopites de Madagascar et les pyroxenites qui les renferment. Annales Géologiques du Service des Mines, Imprimerie Tananarive, fasc XI, pp. 27-37 (in French).

Lardeaux, J.M., Martelat, J.E,, Nicollet, C., Pili, E., Rakotondrazafy & Cardon, H. (1999). Metamorphism and Tectonics in Southern Madagascar: An Overview. Gondwana Research, Vol. 2, No. 3, pp. 355-362.

Martelat, J.E., Lardeaux, J. M., Nicollet, C. & Rakotondrazafy, R. (2000). Strain pattern and late Precambrian deformation history in southern Madagascar. Precambrian Research, Vol. 102, Issues 1-2, pp. 1-20. abstract

Martelat, J.E., Nicollet, C., Lardeaux, J. M. & Rakotondrazafy, R. (1997). Lithospheric tectonic structures developed under high-grade metamorphism in the Southern part of Madagascar. Geodinamica Acta, Vol. 10, No. 3, pp. 94-114.

Mercier, A., Rakotondrazafy, M. & Ravolomiandrinarivo, B. (1999). Ruby mineralization in southwest Madagascar. Gondwana Research, Vol. 2, Issue3, pp. 433-438. abstract

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Milisenda, C.C. (1995). Saphire aus Madagaskar. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 44, pp. 3-4 (in German).

Milisenda, C.C. & Henn, U. (1996). Compositional characteristics of sapphires from a new find in Madagascar. The Journal of Gemmology, Vol. 25 No. 3, pp. 177-184.

Milisenda, C., Henn, U. & Henn, J. (2001). New gemstone occurrences in the south-west of Madagascar. The Journal of Gemmology, Vol. 27, No. 7, pp. 385–394.

Moine, B., Rakotondratsima, C. & Cuney, M. (1985). Les pyroxenites à urano-thorianite du Sud-Est de Madagascar: conditions physico-chimiques de la metasomatose. Bulletin de Mineralogie, No. 108, No. 3-4, pp. 325-340 (in French).

Nicollet, C. (1986). Saphirine et staurotide riche en magnésium et chrome dans les amphibolites et anorthosites à corindon du Vohibory Sud, Madagascar. Bulletin de Minéralogie, Vol. 109, No. 5, pp. 599-612 (in French).

Nicollet, C. (1990). Crustal evolution of the granulites of Madagascar In: Vielzeuf, D. & Vidal, P. (Eds.) Granulites and crustal evolution. Kluwer Academic Publishers, Dordrecht, pp. 291-310. abstract + references

Noizet, G. & Delbos, L. (1955). Etude géologique des schistes cristallines de l'Androy Mandrareen. Travaux du Bureau Géologique Madagascar, No. 65 (in French).

Offant, Y. (2005). Caractérisation pétrographique et minéralogique du gisement à saphir de Sahambano (Madagascar). MSc Thesis. University Paul Cézanne, Aix-en Provence, France, 33 p (in French).

Pardieu, V. (2013). Update on Sapphire Mining in Ilakaka-Sakaraha, Madagascar on www.gia.edu

Pardieu, V. & Rakotosaona, N. (2012; Ongoing Research; Retrieved December 9th 2013) Ruby and Sapphire Rush near Didy, Madagascar (April - June, 2012) on www.giathai.net

Pezzotta, F. (2001). Madagascar: A Mineral and Gemstone Paradise. extraLapis, No. 1, Lapis International LLC, East Hampton, Connecticut, USA, 97 p. ISBN 978-0971537101 (in English). review

Pezzota, F. (2005). Rubini e Zaffiri. Corindoni policromi di Amboarohy, Ihosy, Madagascar. Rivista Mineralogica Italiana, Vol. 2, pp. 116-124 (in Italian).

Piat, C.D. & Bouqueau, M.-P. (1995). En direct de Madagascar. Revue de Gemmologie, Association Française de Gemmologie, No. 123, pp. 12-13 (in French).

Rakotondrazafy, M., Giuliani, G., Fallick, A.E., Ohnenstetter, D., Andriamamonjy, A., Rakotosamizanany, S., Ralantoarison, Th., Razanatseheno, M., Offant, Y., Garnier, V., Maluski, H., Dunaigre, Ch., Schwarz, D., Mercier, A. & Ratrimo, V. (2008). Gem corundum deposits in Madagascar: a review In: Graham, I.T., Zaw, K. & Cook, N.J. (Eds.) Ore Geology Reviews, Special Issue - The Genesis of Gem Deposits, Vol. 34, Issues 1–2, pp. 134-154.

Rakotondrazafy, A.F.M., Moine, B., Giuliani, G., Razanatseheno, M.O., Rakotosamizanany, S., Schwarz, D., Ravololomiandrinarivo, B., Ralantoarison, L.T. & Andriamamonjy, S.A. (2005). Gem corundum deposits in Madagascar. Salt Lake City Annual Meeting (October 16-19), Geological Society of America with programs, Vol. 37, No. 7, pp. 499.

Rakotosamizanany, S. (2003). Les gisements de rubis Saomiakatra: caractères minéralogiques - gemmologiques - conditions de formation (au Sud d'Antanifotsy). Unpublished MSc Thesis. University of Antananarivo, Madagascar, p. 74 (in French).

Rakotosamizanany, S., Giuliani, G., Ohnenstetter, D., Rakotondrazafy, M.A.F. & Fallick, A.E. (2009). Gisements de saphirs et rubis associes aux basaltes alcalins de Madagascar: caracteristiques geologiques et mineralogiques. 1ième partie: caracteristiques geologiques des gisements. Revue de Gemmologie, Association Française de Gemmologie, No. 169, pp. 13-21 (in French).

Rakotosamizanany, S., Giuliani, G., Ohnenstetter, D., Rakotondrazafy, M.A.F. & Fallick, A.E. (2009). Gisements de saphirs et rubis associes aux basaltes alcalins de Madagascar: caracteristiques geologiques et mineralogiques. 2ième partie : caracteristiques mineralogiques. Revue de Gemmologie, Association Française de Gemmologie, No. 170, pp. 9-18 (in French).

Ralantoarison, L.T. (2006). Les corindons métamorphiques associes aux zones de cisaillement du Sud de Madagascar: le gisement de saphir de Sahambano (Sud-Est d'Ihosy). DEA Thesis. University of Antananarivo, Madagascar, 100 p (in French).

Ralantoarison L.T., Offant, Y., Andriamamonjy, A., Giuliani, G., Rakotondrazafy, A.F.M., Ohnenstetter, D., Schwarz, D., Fallick, A., Razanatseheno, M., Rakotosamizanany, S., Moine, B. & Baillot, P. (2006). Les saphirs multicolores de Sahambano et Zazafotsy, région granulitique d'Ihosy, Madagascar. Revue de Gemmologie, Association Française de Gemmologie, No. 158, pp. 4-13 (in French).

Ramdohr, R. & Milisenda, C.C. (2004). Neue Vorkommen von Saphir-Seifenlagerstätten auf Nosy-Bé. Madagaskar. Gemmologie: Zeitschrift Der Deutschen Gemmologischen Gesellschaft, Vol. 53, No. 4, pp. 143-158 (in German).

Ramdohr, R. & Milisenda, C.C. (2006). A new find of sapphire placer deposits on Nosy-Bé, Madagascar. The Journal of Gemmology, Vol. 30, No. 3-4, p. 144-154.

Salerno, S. (1992). Mineraux et Pierres de Madagascar. Revue de Gemmologie, Association Française de Gemmologie, No. 111, pp. 9-10 (in French).

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Schmetzer, K. (1999). Ruby and Variously Coloured Sapphires from Ilakaka, Madagascar. The Australian Gemmologist, Vol. 20, No. 7, pp. 282-284.

Schwarz, D. & Schmetzer, K. (2001). Rubies from the Vatomandry area, eastern Madagascar. The Journal of Gemmology, Vol. 27, No. 7, pp. 409-16.

Schwarz, D. & Schmetzer, K. (2002). Rubies from the Region of Vatomandry in East Madagascar. Deutsche Goldschmiede Zeitung, February, pp. 130-136.

Schwarz, D. & ... (2001). Saphire aus der Provinz Antsiranana, Nord-Madagaskar. Deutsche Goldschmiede Zeitung, Vol. 3, pp. xxx-xxx.

Schwarz, D., Kanis, J. & Schmetzer, K. (2000). Sapphires from Antsiranana Province, Northern Madagascar. Gems & Gemology, Fall, Vol. 36, No. 3, pp. 216-233.

Schwarz, D., Petsch, E. J. & Kanis, J. (1996). Sapphires from the Andranondambo Region, Madagascar. Gems & Gemology, Vol. 32, No. 2 (Summer), pp. 80-99.

Tang, Z.-W. (2009). Colour characteristics of blue sapphire from Madagascar. Journal of Gems & Gemology, Vol. 11, No. 2, pp. 24-29.

Windley, B.F., Razafiniparany, A., Razakamanana, T. & Ackermand, D. (1994). The tectonic framework of the Precambrian of Madagascar and its Gondwana connections: a review and reappraisal. Geologische Rundschau, Vol. 83, Issue 3, pp. 642-659. abstract + references

Malawi

Bank, H. & Henn, U. (1990). New sources for tourmaline, emerald, ruby, and spinel. ICA Gazette, April, p. 7.

Bank, H., Henn, U. & Lind, T. (1988). Rubine aus Malawi. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 37, Nos. 3-4, pp. 113-119 (in German).

Bank, H., Henn, U. & ... (1989). Hochlichtbrechender Rubin aus Malawi. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 38, Nos. 2/3, pp. 106-107 (in German).

Bloomfield, K. (1958). The Chimwadzulu Hill ultrabasic body. Transactions of the Geological Society of South Africa, Vol. 61. abstract

Bloomfield, K. & Garson, M.S. (1958). The Geology of the Kirk Range - Lisungwe Valley area. Malawi Geological Survey Department Bulletin No. 17, 234 p.

Boehm, E. (2004). Gem News International: New ruby production from Malawi. Gems & Gemology, Vol. 40, No. 1 (Spring), pp. 71.

Dill, H.G. (2007). A review of mineral resources in Malawi: With special reference to aluminium variation in mineral deposits. Journal of African Earth Sciences, Vol. 47, No. 3, pp. 153-173. abstract + references

Drucker, R.B. (2012). Malawi sapphires: sustainable production, range of color, and even some Padparadscha. Gem Guide: Gem Market News, Vol. 31, No. 3, pp. 1, 4, 15.

Grubessi, O. & Marcon, R. (1986). A peculiar inclusion in a yellow corundum from Malawi. The Journal of Gemmology, Vol. 20, No. 3, pp. 163-165.

Henn, U. & Bank, H. (1990). Blaue saphire aus Malawi. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 39, No. 1, pp. 89-92 (in German).

Henn, U., Bank, H. & Bank, F.H. (1990). Orangefarbene korunde aus Malawi. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 38, No. 4, pp. 164-166 (in German).

Henn, U., Bank, H. & Bank, F.H. (1990). Red and orange corundum (ruby and padparadschah) from Malawi. The Journal of Gemmology, Vol. 22, No. 2, pp. 83-89.

Hill, D.G. (2007). A review of mineral resources in Malawi: With special reference to aluminium variation in mineral deposits. Journal of African Earth Sciences, Vol. 47, No. 3, pp. 153-173. abstract + references

Hughes, R.W. (1997). Malawi In: Ruby & Sapphire, pp. 382-383. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Jobbins, E.A. (1971). Heat-Treatment of Pale Blue Sapphire from Malawi. The Journal of Gemmology, Vol. 12, No. 8, pp. 342-343.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Rankin, A.H. (2002). Natural and Heat-Treated Corundum from Chimwadzulu Hill, Malawi: Genetic Significance of Zircon Clusters and Diaspore-Bearing Inclusions. The Journal of Gemmology, Vol. 28, No. 2, pp. 65-75. abstract

Rutland, E.H. (1969). Corundum from Malawi. The Journal of Gemmology, Vol. 11, No. 8, pp. 320-323.

Montana

Baiz, C. (2009). Gem News International: Yogo sapphire update. Gems & Gemology, Vol. 45, No. 3 (Fall), pp. 225-226.

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 291. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Berg, R.B. (2002). Probable Sources of Alluvial Sapphires in Western Montana. GSA Rocky Mountain 54th Annual Meeting (May 7-9, 2002), Session No. 20. abstract

Berg, R.B. (2003). Probable Bedrock Source of Sapphires in Alluvial Deposits North of Butte, Montana. In: Castor, S.B., Papke, K.G. & Meeuwig, R.O. (Eds.) Proceedings of the 39th Forum on the Geology of Industrial Minerals, May 18-23, 2003, Nevada Bureau of Mines and Geology, Special Publication 33, pp. 23-30.

Berg, R.B. (2007). Sapphires in the Butte-Deer Lodge area, Montana. Montana Bureau of Mines and Geology, Montana. Bulletin 134, 59 p., ASIN B003I7XUZY.

Berg, R.B. (2013). Comparison of surface morphology of Montana alluvial sapphires by SEM. Technical Session 218: Gemological Research in the 21st Century: Characterizing Diamonds and other Gem Minerals, Tuesday, 29 October 2013. Geological Society of America Abstracts with Programs, Vol. 45, No. 7, p. 525. abstract

Berg, R.B., Gammons, C.H. & Arehart, G.B. (2008). Preliminary Oxygen Isotope Values for Montana Sapphires. Technical Session 193: Mineralogy/Crystallography; Petrology, Experimental; Igneous; Metamorphic (Posters), Monday, 6 October 2008. Geological Society of America Abstracts with Programs, Vol. 40, No. 6, p. 254. abstract

Clabaugh, S.E. (1952). Corundum Deposits of Montana: A description of one of the three commercial deposits found in the United States. United States Geological Survey, Bulletin 983, Dept. of the Interior, Washington, 100 p.

Dunn, P.J. (1976). Inclusions in Sapphires from Yogo Gulch, Montana. Gems & Gemology, Vol. 15, No. 7, p. 200.

Emmett, J.L. & Douthit, T.R. (1993). Heat Treating the Sapphires of Rock Creek, Montana. Gems & Gemology, Vol. 29, No. 4 (Winter), pp. 250-272.

Freeman, L.W. (2002). Yogo sapphires from the Vortex mine, Montana: Gemstone deposits of Colorado and the Rocky Mountain region, September 7-10, Golden, Colorado, Program and Abstracts, pp. 18-20.

Freeman, L.W. (2003). Yogo sapphires from the Vortex mine, Montana: Bringing mother nature to the market the old fashioned way. 2003 SME Annual Meeting and Exhibit, Technical Program, p. 119.

Garland, M.I. (2002). The Alluvial Sapphire Deposits of Western Montana. Doctor of Philosophy Thesis. Graduate Department of Geology, University of Toronto, Ontario, Canada, 381 p.

Garland, M.I. & Gorton, M.P. (2002). The alluvial sapphire deposits of western Montana: Gemstone deposits of Colorado and the Rocky Mountain region, September 7-10, Golden, Colorado, Program and Abstracts, pp. 75-77.

Heinrich, E.W. (1949). Pegmatites of Montana. Economic Geology, Vol. 44, No. 4, pp. 307-335.

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1997). United States of America (USA) In: Ruby & Sapphire, pp. 434-473. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Hughes, R.W. (2012). Michael Duane Roberts, Yogo Sapphire Mine, 1957-2012, R.I.P., published March 21st 2012 on www.ruby-sapphire.com

Koivula, J.I., Fryer, C.W. & Kammerling, R.C. (1991). Almandine Garnet in Montana Sapphire. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 40, Nos. 2/3, pp. 89-92.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Mychaluk, K.A. (1995). The Yogo Sapphire Deposit. Gems & Gemology, Vol. 31, No. 1, pp. 28-41.

Thompson, S.E. (2009). Smokin' stones: Montana sapphires. Jewelry Artist, Vol. 63, No. 2, p. 66.

Voynick, S.M. (1987). Yogo: the great American sapphire. Revised Edition, Mountain Press Publishing Company, Missoula, 215 p. ISBN 978-0878422173.

White, J.S. (2010). U.S. Gemstones: an overview. Rocks & Minerals, Vol. 85, No. 1, pp. 14-23.

Zwaan, J.C. (Hanco), Buter, E., Mertz-Kraus, R. & Kane, R.E. (2015). Alluvial sapphires from Montana – Inclusions, geochemistry and indications for a metasomatic origin In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 53-55. The entire publication is available on www.igc-gemmology.net

Mozambique

Anonymous (2012). Mozambique: American Arrested Trying to Smuggle Rubies, published September 19th 2012 on www.allafrica.com

Anonymous (2012). Ruby project in Mozambique faces problems because of illegal mining, published June 7th 2012 on www.macauhub.com.mo

Esterhuizen, I. (2012). Gemfields completes Mozambique ruby acquisition, published February 27th 2012 on www.miningweekly.com

Krzemnicki, M.S. & Hänni, H.A. (2009). Neu im Handel: Rubine aus Montepuez, Mosambik, SSEF Publication, Stones, pp. 66-67. www.ssef.ch

Krzemnicki, M.S. & Hänni, H.A. (2009). Nouveauté sur le marché: Rubis de Montepuez, Mozambique, SSEF Publication, Stones, pp. 68-69. www.ssef.ch

McClure, S.F. & Koivula, J.I. (2009). Gem New International: Preliminary observations on new rubies from Mozambique. Gems & Gemology, Vol. 45, No. 3 (Fall), pp. 224-225.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Pardieu, V., Thanachakaphad, J., Jacquat, S., Senoble, J.-B. & Bryl, L.-P. (2009). Rubies from the Niassa and Cabo Delgado regions of Northern Mozambique on www.giathai.net

Pardieu, V., Jacquat, S., Senoble, J.-B., Bryl, L.-P., Hughes, R.W. & Smith, M. (2009). Expedition report to the Ruby mining sites in Northern Mozambique (Niassa and Cabo Delgado provinces) on www.giathai.net

Pardieu, V. & Lomthong, P. (2009). Gem News International: Update on rubies from Mozambique. Gems & Gemology, Vol. 45, No. 4 (Winter), pp. 302-303.

Pardieu, V., Sturman, N., Saesaew, S., Du Toit, G. & Thirangoon, K. (2010). FAPFH/GFF Treated Ruby from Mozambique, a preliminary report on www.giathai.net

Pardieu, V. & Chauviré, B. (2012). Gem News International: Update on ruby mining in Northerm Mozambique. Gems & Gemology, vol. 48, No 4, (Winter), pp. 309-311.

Pardieu, V., Sangsawong, S., Muyal, J., Chauviré, B., Massi, L. & Sturman, N. (2013). Rubies from the Montepuez area (Mozambique) on www.giathai.net

Nepal

Baba, T. (1982). A gemstone trip to Nepal. Gemmological Review, Vol. 4, No. 12, pp. 2–5.

Bank, H., Gübelin, E.J., Harding, R.R., Henn, U., Scarratt, K. & Schmetzer, K. (1988). An unusual ruby from Nepal. The Journal of Gemmology, Vol. 21, No. 4, pp. 222-226.

Bassett, A.M. (1979). Hunting for gemstones in the Himalayas of Nepal. The Lapidary Journal, Vol. 33, No. 7, pp. 1492–1520.

Bassett, A.M. (1984). Rubies in the Himalayas of Nepal. Report submitted to the Nepal Department of Mines and Geology, Katmandu, 19 p.

Chakrabarti, C.K. (1994). A preliminary report on the Ganesh Himal ruby occurrences. Submitted to the Nepal Department of Mines and Geology, Katmandu, 8 p.

Harding, R.R. & Scarratt, K. (1986). A description of ruby from Nepal. The Journal of Gemmology, Vol. 20, No. 1, pp. 3–10.

Henn, U. & Milisenda, C.C. (1994). A microscopical study of Nepalese ruby and sapphire. Journal of the Gemmological Association of Hong Kong, Vol. 17, pp. 82–84. Journal of the Gemmological Association of Hong Kong

Hughes, R.W. (1997). Nepal In: Ruby & Sapphire, pp. 384. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Kiefert, L. & Schmetzer, K. (1986). Rosafarbene and violette Sapphire aus Nepal. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 35, No. 3-4, pp. 113-125 (in German).

Kiefert, L. & Schmetzer, K. (1987). Pink and violet sapphires from Nepal. The Australian Gemmologist, Vol. 16, No. 6, pp. 225-230.

Koivula, J.I., Kammerling, R.C. & Fritsch, E. (1993). Gem News: Nepal Update. Gems & Gemology, Vol. 29, No. 3 (Fall), pp. 211.

Koivula, J.I., Kammerling, R.C. & Fritsch, E. (1993). Gem News: Unusual double star sapphire. Gems & Gemology, Vol. 29, No. 3 (Fall), pp. 212-213.

Niedermayr, G., Brandstätter, P. & Hammer, V.M.F. (1993). Edel- und Schmucksteinvorkommen in Nepal. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 42, No. 2/3, pp. 69–89 (in German).

Smith, C.P., Gübelin, E.J., Bassett, A.M. & Manandhar, M.N. (1997). Rubies and fancy-color sapphires from Nepal. Gems & Gemology, Vol. 33, No. 1 (Spring), pp. 24-41.

Tamrakar, S. M. (1990). Status of Gem industry of Nepal. A country paper presented for the training course on gemstones, Jaipur, India. Organized by ESCAP. DMG Unpublished Report, 18 p.

Themelis, T. (1988). Blue spot on ruby. The Lapidary Journal, Vol. 42, No. 1 (April), p. 19.

New Zealand

Grapes, R. & Palmer, K. (1996). (Ruby—Sapphire)—Chromian Mica—Tourmaline Rocks from Westland, New Zealand. Journal of Petrology, Vol. 37, Issue 2, pp. 293-315. abstract

Grapes, R.H. & Hoskin, P.W.O. (2004). Colour zoning and composition of ruby-sapphire from Westland, New Zealand. The Journal of Gemmology, Vol. 29, No. 1, pp. 8-14. abstract

Hughes, R.W. (1997). Laos In: Ruby & Sapphire, p. 384. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Nigeria

Bank, H. (1986). Blue gahnites, blue, yellow and green sapphires and brown zircons from Nigeria. Call Idar-Oberstein, p. 13.

Henn, U. (1986). Saphire aus Nigeria und von Sta Terezinha de Goias, Brazilien. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 35, No. 1-2, pp. 15-19 (in German).

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1997). Nigeria In: Ruby & Sapphire, p. 385. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Kanis, J. & Harding, R.R. (1990). Gemstone prospects in central Nigeria. The Journal of Gemmology, Vol. 22, No. 4, pp. 195-202.

Kiefert, L. & Schmetzer, K. (1987a). Blaue und gelbe Saphire aus der Provinz Kaduna, Nigeria. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 36, No. 1-2, pp. 61-78 (in German).

Kiefert, L. & Schmetzer, K. (1987). Blue and Yellow Sapphire from Kaduna Province, Nigeria. The Journal of Gemmology, Vol. 20, Nos. 7/8, pp. 427-442. abstract

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Pakistan

Anonymous (Not dated; Retrieved December 19th 2013). Pakistan’s Gemstones: An Overview on www.palagems.com

Bank, H. & Okrusch, M. (1976). Über Rubin-Vorkommen in Marmoren van Hunza (Pakistan). Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 25, No. 2, pp. 67-85 (in German).

Beesley, C.R. (1986). Pakistan's emeralds: a trickle becomes a stream. Jeweler's Circular-Keystone, February, pp. 359-365.

Beesley, C.R. (1987). Pakistan's gems: Untapped potential. Jeweler's Circular-Keystone, February, pp. 172-175.

Brown, J.C. (1936). India's mineral wealth. Oxford University Press, Calcutta, 335 p.

Carrel, R.-P. (1974). Les pierres précieuses du Pakistan. Bulletin de l'Association Française de Gemmologie, Vol. 41, p. 7 (in French).

Gübelin, E.J. (1981). The Emerald and the Ruby/Spinel Resources of Pakistan. The Journal of the Gemmological Society of Japan, Vol. 8, Nos. 1-4, December, pp. 61-66.

Gübelin, E.J. (1982). Die Edelsteinvorkommen Pakistans, 1. Teil: Die Rubine aus dem Hunzatal. Lapis, Vol. 7, No. 5, pp. 19-26.

Gübelin, E.J. (1982). Gemstones of Pakistan: Emerald, Ruby and Spinel. Gems & Gemology, Vol. 18, No. 3 (Fall), pp. 123-139.

Gübelin, E.J. & Dillon, S. (1981). Gem News: Pakistan enters the gem scene. Gems & Gemology, Vol. 17, No. 3 (Fall), pp. 180-181.

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1994). The Rubies and Spinels of Afghanistan – A brief history on www.ruby-sapphire.com

Hughes, R.W. (1997). Pakistan In: Ruby & Sapphire, pp. 385-388. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Kazmi, A.H. (1989). A brief overview of the geology and metallogenic provinces of Pakistan In: Kazmi, A.H. & L. W. Snee, L.W. (Eds.) Emeralds of Pakistan: Geology, Gemology, and Genesis, pp. 1-11. Van Nostrand Reinhold, New York, 269 p. ISBN 978-0-442-30328-0.

Kazmi, A.H. & O'Donoghue, M. (1990). Gemstones of Pakistan: Geology and Gemmology, Gemstone Corporation of Pakistan, Peshawar, 146 p.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Okrusch, M., Bunch, T.E. & Bank, H. (1976). Paragenesis and petrogenesis of a corundum-bearing marble at Hunza (Kashmir). Mineralium Deposita, Vol. 11, Issue 3, pp. 278-297. abstract + references

Pêcher, A., Giuliani, G., Garnier, V., Maluski, H., Kausar, A.B., Malik, R.H. & Muntaz, H.R. (2002). Geology, geochemistry and Ar-Ar geochronology of the Nangimali ruby deposit, Nanga Parbat Himalaya (Azad Kashmir, Pakistan). Journal of Asian Earth Sciences, Vol. 21, pp. 265-282. abstract

Piat, D. (1974). Le rubis Himalayen d'Hunza. Bulletin de l'Association Française de Gemmologie, Vol. 41, p. 5-7 (in French).

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Poland

Kozłowski, A. & Sachabiński, M. (2007). Karkonosze intragranitic pegmatites and their minerals. Granitoids in Poland, AM Monograph No. 1, pp. 155-178.

Russia

Buravleva, S.U., Pakhomova, V.A., Zalishchak, B.L., Ushkova, M.A., Ekimova, N.I., Fedoseev, D.G. & Kamynin, V.A. (2008). Corundum of the Russian Far East. Journal of the Gemmological Association of Hong Kong, Vol. 29, pp. 13-16. Journal of the Gemmological Association of Hong Kong

Evseev, A.A. (1993). The South Urals: A brief mineralogical guide. World of Stones, No. 1, pp. 31-35.

Evseev, A.A. (1993). The Urals (from Middle to Polar): A brief mineralogical guide. World of Stones, No. 2, pp. 35-41.

Evseev, A.A. (1994). North and East Europe: A brief review of mineral localities. World of Stones, No. 3, pp. 43-53.

Gromov, A.V. (1993). Rose corundum from the Khitostrov locality of north Karelia. World of Stones, No. 2, pp. 2-4.

Hughes, R.W. (1997). Nigeria In: Ruby & Sapphire, p. 388. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Johnson, M.L. & Koivula, J.I. (1998b). Gem News: Sapphire from the Ural Mountains. Gems & Gemology, Vol. 34, No. 3 (Fall), p. 226.

Khanchuk, A., Zalishchak, B., Pakhomova, V., Odarichenko, E. & Sapin, V. (2003). Genesis and gemmology of sapphires from the Nezametnoye deposit, Primorye region, Russia. The Australian Gemmologist, Vol. 21, No. 9, pp. 369-375.

Kissin, A.J. (1990). The formation of ruby-bearing marbles. Abstracts of the 12th USSR Precambrian Metallogenic Conference, Precambrian Metalliferous and Metamorphic Ore Formation, Kiev, Part 2, pp. 221-222.

Kissin, A.J. (1990). The Uralian ruby-bearing province. Abstracts of the Second Regional Mineralogical Conference, Mineralogia Urala, Miass., Kiev, Vol. 2, pp. 120-123 (in Russian).

Kissin, A.J. (1991). Ruby deposits in marble. Sverdlovsk, Russian Academy of Sciences, Uralian Branch (in Russian).

Kissin, A.J. (1994). Ruby and Sapphire from the Southern Ural Mountains, Russia. Gems & Gemology, Vol. 30, No. 4 (Winter), pp. 243-252.

Koivula, J.I. & Kammerling, R.C. (1991). Gem News: Czechoslowakian conference yields valuable information [Russian ruby]. Gems & Gemology, Vol. 27, No. 4 (Winter), p. 256.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Pakhomova, V.A., Zalishchak, B.L., Odarichenko, E.G., Lapina, M.I. & N.S. Karmanov, N.S. (2006). Study of melt inclusions in the Nezametnoye corundum deposit, Primorsky region of the Russian Far East: Petrogenetic consequences. Journal of Geochemical Exploration, Vol. 89, Nos. 1-3, pp. 302–305.

Samsonov, J.P. & Turingue, A.P. (1985). Gems of the USSR, Moscow.

Serdynchenko, D.P. & Polynovskyi, R.M. (1971). Sillimanite-corundum gneiss of the central Azov region and its mode of origin. Proceedings of the Russian Academy of Sciences - Earth Science Section, Vol. 197, pp. 156-159.

Rwanda

Anonymous (1995). Sapphire from Rwanda appears on the market. ICA Gazette, June, p. 6.

Hughes, R.W. (1997). Rwanda In: Ruby & Sapphire, p. 388. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Krzemnicki, M. S., Hänni, H.A., Guggenheim, R. & Mathys, D. (1996). Investigations on sapphires from an alkali basalt, South West Rwanda. The Journal of Gemmology, Vol. 25, No. 2, pp. 90-106. Also published on www.ssef.ch

Scotland

Anonymous (1995). 242-carat sapphire found in Lewis. Herald Scotland, Tuesday May 2nd 1995 on

Anonymous (1998). Gem of a find among the rotting rubbish. The Scotsman, March 5th 1998.

Jackson, B. (1984). Sapphire from Loch Roag, Isle of Lewis, Scotland. The Journal of Gemmology, Vol. 19, No. 4, pp. 336-342.

Hughes, R.W. (1997). United Kingdom (UK) & Ireland In: Ruby & Sapphire, p. 453. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Livingstone, A. (2003). Minerals of Scotland. 1st Edition, NMSE - Publishing Ltd., 212 p. ISBN 978-1901663464.
See also Minerals of Scotland

Ralph, J. (2010). Gem sapphires from Scotland. The Vug, Vol. 3, No. 1, pp. 65-67. Also visit mineralmagazine.com

Smith, G. (Not dated; Retrieved December 8th 2013). Prospects for an expanding gemstone industry. Scottish gemstones. Britisch Geological Survey.

Smith, C.G., Faithful, J.W. & Jackson, B. (2008). Gemstone prospectivity in Scotland - a golden future? In: Walton, G. (Ed.) Proceedings of the 14th Extractive Industry Geology Conference, 14-17 June 2006, Edinburgh, Scotland, pp. 9-11, EIG Conferences, 109 p. abstract

Slovakia

Böhmer, M. & Šímová, M. (1976). Contact-metasomatic aureole of Miocene intrusives in the Kremnica Mountains. Acta Geol. Geogr. Univ. Comen. Geol., Vol. 30, pp. 119-137. (in Slovak).

Derco, J., Kozáč, J. & Očenáš, D. (1977). New data about minerals and genesis of secondary quartzites of the Kapka locality in central Vihorlat. Mineralia Slovaca, Vol. 9, pp. 185-205. (in Slovak with English summary).

Ďuďa, R., Černý, P., Kaličiak, M., Kaličiaková, E., Tözsér, J., Ulrych, J. & Veselovský, F. (1981). Mineralogy of northern part of the Slanské Mountains. Mineralia Slovaca — Monograph, No. 2, Bratislava, pp. 1-99. (in Slovak with English summary).

Fiala, F. (1954). Some xenoliths of andesites from the Slovak Midmountains. Sbor. Ústř. Úst. Geol. Odd. Geol., Vol. 21, pp. 309-357. (in Czech).

Gregáňová M. (2002). Sapphire and associated minerals from the Hajnáčka. Unpublished M.Sc. Thesis, Dept. of Mineralogy and Petrology, Comenius University, Bratislava, 75 p. (in Slovak).

Hovorka D. & Lukáčik E. 1972). Xenoliths in andesites of the Massifs Karanč, Šiator (Southern Slovakia) and their geologic interpretation. Geol. Zbor. Geol. Carpath. 23, 297-303.

Hvožďara P. & Činčár J. (1972). Corundum: an accessory mineral in the Central Slovak neovolcanics. Zbor. Pedag. Fak. Univ. Šafár. Prír. Vedy 11, 143-157 (in Slovak).

Szakáll, S., Udubaşa, G., Ďuďa, R., Kvasnytsya, V., Koszowska, E. & Novák, M. (2002). Minerals of the Carpathians. Granit Publishing House, Prague, 479 p. ISBN 978-80-7296-014-9. Minerals of the Carpathians

Szádeczky, J. (1899). The corundum occurrences in Hungary. Földtani Közlöny, Vol. 29, pp. 240-252. (in Hungarian).

Uher, P., Sabol, M., Konečný, P., Gregáňová, M., Táborský, Z. & Puškelová, Ľ. (1999). Sapphire from Hajnáčka (Cerová Highland, southern Slovakia). Slovak Geological Magazine, Vol. 5, No. 4, pp. 273-280.

Uher, P., Gregáňová, G. & Szakáll, S. (2006). Sapphire-bearing syenite xenolith from Gortva, Cerová Mountains, Slovakia. Acta Mineralogica-Petrographica, Abstract Series 5, p. 124.

Uher, P., Giuliani, G., Szakáll, S., Fallick, A., Strunga, V., Vaculovic, T., Ozdín, D. & Gregánovic, M. (2012). Sapphires related to alkali basalts from the Cerová Highlands, Western Carpathians (southern Slovakia): composition and origin. Geologica Carpathica, Vol. 63, No. 1, pp. 71-82. abstract

Vass, D., Bezák, V., Elečko, M., Konečný, V., Lexa, J., Pristaš, J., Straka, P. & Vozár, J. (1992a). Geological map of Lučenská kotlina Depression and Cerová vrchovina Upland 1 : 50,000. Dionýz Štúr Geological Institute, Bratislava.

Vass, D., Elečko, M., Bezák, V., Bodnár, J., Konečný, V., Lexa, J., Molák, B., Pristaš, J., Straka, P., Stankovič, J., Stolár, M., Škvarka L., Vozár J. & Vozárová, A. (1992). Explanations to geological map of the Lučenec Basin and Cerová Highland. 1 : 50,000. Dionýz Štúr Geological Institute, Bratislava, 1-196 (in Slovak).

Vass, D., Konečný, V., Túnyi, I., Dolinský, P., Balogh, K., Hudáčková, N., Kováčová-Slámková, M. & Beláček, B. (2000). Origin of the Pliocene Vertebrate bone accumulation at Hajnáčka, Southern Slovakia. Geologica Carpathica, Vol. 51, pp. 69-82.

Sri Lanka (Ceylon)

Ali, S.H. & Dickinson DeLeon, S. (Not dated; Retrieved December 29th 2013). Case Study: Sri Lanka's Gemstones on Gems and the Environment

Anonymous (2011). Ceylon sapphire rides the royal wedding wave. Art of Jewellery, Vol. 10, No. 6, pp. 90, 92.

Anonymous (2012). Blue sapphire discovery in Sri Lanka. Bangkok Gems & Jewellery, Vol. 25, No. 9, pp. 28-29. www.gemgateway.com

Anonymous (2012). Sapphires discovered in Kataragama. Jewellery News Asia, p. 47. www.jewellerynewsasia.com

Ariyaratna, D.H. (2006). Gems of Sri Lanka. 6th Revised & Enlarged Edition, private publication, London, 177 p. ISBN 955-95494-4-8.

Arps, C.E.S. (1986). In search of the source rocks of Sri Lanka's gemstones: A progress report. The Australian Gemmologist, Vol. 16, No. 3 (August), p. 117.

Ball, S.H. (1922). The Geologic and Geographic Distribution of Precious Stones. Economic Geology, Vol. 17, No. 7 (November), pp. 575-602.

Ball, S.H. (1931). Historical notes on gem mining. Economic Geology, Vol. 26, No. 7 (November), pp. 681-738.

Ball, S.H. (1931). The Geologic and Geographic Occurrence of Precious Stones. Economic Geology, Vol. 30, pp. 630-642.

Ball, V. (2001). Travels in India by Jean-Baptiste Tavernier. Translated from the original French edition of 1676 by Jean-Baptiste Tavernier with a biographical sketch of the Author, Notes, Appendices, etc. 2nd Edition, Edited by William Crooke, 2 Vols., Munshiram Manoharlal Publishers, New Delhi, India, Vol. 1 - 399 p. ISBN 81-215-0683-2; Vol. 2 - 335 p. ISBN 81-215-0684-0. Set - ISBN 81-215-0682-4.

Bancroft, P. (1984). Ceylon’s Gem Mines: Pelmadulla Mine, Ratnapura, Sri Lanka In: Gem & Crystal Treasures, Western Enterprises, 488 p. ISBN 978-0961346119.
Also published on www.palagems.com Visit the Bancroft Mineral Collection

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 277, 287-288. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Biswas, A.K. (2001). Minerals and their Exploitation in Ancient and Pre-modern India In: Ramachandra, P.R. & Goswami, N.G. (Eds.) Metallurgy in India: A Retrospective, pp. 1-24. National Metallurgical Laboratory, Jamshedpur, India, 535 p. ISBN: 81-87053-56-7.

Bretschneider, E. (1887). Medieval Researches from Eastern Asiatic Sources. Fragments towards the knowledge of the geography and history of central and western Asia from the 13th to the 17th century. Kegan Paul, Trench, Trübner & Co., London, 2 Vols., 334 pp. Reprinted 1967, Barnes & Noble, New York.

Carbonin, S., Sbrignadello, G. & Ajò, D. (1998). An interdisciplinary approach to identifying solid inclusions in corundum: thorite in a ‘Sri Lanka’ sapphire. The Journal of Gemmology, Vol. 26, No. 4, pp. 262-264.

Coggin Brown, J. & Dey, A.K. (1955). Mineral Wealth: India, Pakistan, Bangladesh and Burma. A Guide to the Occurrence and Economics of the Useful Minerals. 2 Vols., Isha Books, Delhi, 761 p. ISBN 978-81-8205-483-7.

Cresbon, F., Lebrun, P., Le Cléac'h, J.-M., Notari, F., Grobron, C. & Deville, J. (2002). Corindon et Spinelles. Minéraux et Fossiles, Hors Série No. 15, Editions Cédim, Paris, 104 p. (in French).

Dahanayake, K. (1980). Modes of occurrence and provenance of gemstones of Sri Lanka. Mineralium Deposita, Vol. 15, Issue 1 (March), pp. 81-86. abstract + references

de Mély, F. & Courel, M.H. 1896-1902). Les Lapidaires de l'Antiquité et du Moyen Age. Histoire des Sciences, 3 Vols., Paris. Vol. 1: Les Lapidaires Chinois, 300 p.; Vol. 2, Parts 1 & 2: Les Lapidaires Grecs, 318 p.; Vol. 3: Les Lapidaires Grecs, 140 p. (in French).

Dissanayake, C.B. & Rupasinghe, M.S. (1993). A prospector's guide map to the gem deposits of Sri Lanka. Gems & Gemology, Vol. 29, No. 3 (Fall), pp. 173-181.

Finot, L. (1896). Les Lapidaires Indiens. Librairie Emile Bouillon, Paris, 281 p. (in French).

Francis, M.D.P.L. & Dharmaratne, P.G.R. (2002). Corundum/spinel reaction textures in carbonate-origin rocks, Sri Lanka – Preliminary observations. The Australian Gemmologist, Vol. 21 (First Quarter), pp. 211-214.

Gamini, Z. (2012). Sapphire Rush in Kataragama. InColor Magazine, International Colored Gemstone Association, Issue 19 (Spring), pp. 56-61. www.gemstone.org

Gamini, E. & Zoysa, G. (2015). Sapphire deposits of Sri Lanka In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 56-59. The entire publication is available on www.igc-gemmology.net

Gopala Iyengar, V. (Editor) (1969). Ratna Pariksha. Tanjore Sarasawati Mahal Series 126, Thanjavur, India, 26 + 88 p. Revised, enlarged, and re-edited from a series of articles by Subrahmanya Sastri, T.K.S (in Devangari with translations in Sanskrit and Tamil and an introduction in English).

Gübelin, E.J. (1940). Characteristics of Ceylon Rubies. Gems & Gemology, Vol. 3, No. 8 (Winter), pp. 121-124.

Gübelin, E.J. (1942). Local Peculiarities of Sapphires, Part 1. Gems & Gemology, Vol. 4, No. 3 (Fall), pp. 34-39.

Gübelin, E.J. (1942). Local Peculiarities of Sapphires, Part 2. Gems & Gemology. Vol. 4, No. 4 (Winter), pp. 50-54.

Gübelin, E.J. (1943). Local Peculiarities of Sapphires, Part 3. Gems & Gemology, Vol. 4, No. 5 (Spring), pp. 66-69.

Gübelin, E.J. (1968). Die Edelsteine der Insel Ceylon. Private publication, Luzern, Switzerland, 152 p. (in German).

Gunaratne, H.S. (1976). On the occurrence of gem corundum in Kolonne. The Journal of Gemmology, Vol. 15, pp. 29-30.

Gunawardene, M. & Rupasinghe, M.S. (1986). The Elahera Gem Field in Central Sri Lanka. Gems & Gemology, Vol. 22, No. 2 (Summer), pp. 80-95.

Heilmann, G. & Henn, U. (1986). On the origin of blue sapphire from Elahera, Sri Lanka. The Australian Gemmologist, Vol. 16, No. 1, pp. 2-4.

Herath, J.W. (1984). Geology and occurrence of gems in Sri Lanka. Journal of the National Sciences Council of Sri Lanka, Vol. 12, No. 2, pp. 257-271.

Hoagland, L.P. (1952). Unusual two and three phase inclusions in Ceylon sapphire. The Journal of Gemmology, Vol. 3, No. 8, pp. 330-336.

Huda, S.N.A. (1998). Arab Roots of Gemology. Ahmad ibn Yusuf Al Tifaschi’s Best Thoughts on the Best of Stones. Scarecrow Press, USA. 271 p. ISBN 0-8108-3294-1. table of contents

Hughes, R.W. (1987). Ruby or pink sapphire? A lesson from the past. Gemological Digest, Vol. 1, No. 1, p. 3.

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1997). Sri Lanka (Ceylon) In: Ruby & Sapphire, p. 389-410. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Katz, M.B. (1972). On the origin of the Ratnapura-type gem deposits of Ceylon. Economic Geology, Vol. 67, No. 1 (February), pp. 113-115.

Katz, M.B. (1986). Review of the geology of the gemstones of Sri Lanka. The Australian Gemmologist, Vol. 16, No. 2, pp. 52-56.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Milisenda, C.C. (1991). Development of the continental crust: a study of the high-grade terrain of Sri Lanka. Unpublished PhD thesis. University of Mainz, Germany.

Milisenda, C.C., Liew, I.C., Hofmann, A.W. & Kröner, A. (1988). Isotopic mapping of age provinces in Precambrian high-grade terrains: Sri Lanka. Journal of Geology, Vol. 96, pp. 608-15. abstract

Milisenda, C.C., Lim, T.C., Hofmann, A.W. & Köhler, H. (1994). Nd isotopic mapping of the Sri Lanka basement: update, and additional constraints from Sr isotopes. Precambrian Research, Vol. 66, pp. 95-110. abstract

Noor, D.M. (1984). Rare gemstones of Sri Lanka. The Lapidary Journal, Vol. 38, No. 1, pp. 238–240.

Pardieu, V., (2012). Sapphire Rush Near Kataragama, Sri Lanka (February–March 2012), 82 p., published on GIA Research News

Rupasinghe, M.S., Banerjee, A., Pense, J. & Dissanayke, C.B. (1983). The geochemistry of beryllium and fluorine in the gem fields of Sri Lanka. Mineralium Deposita, Vol. 19, No. 1 (January), pp. 86-93. abstract + references

Sardha Ratnavira, H.V. (1939). Gemming in Ceylon. Gems & Gemology, Vol. 3, No. 4 (Winter), pp. 51-52.

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Schmetzer, K. & Medenbach, O. (1988). Notes & New Techniques: Examination of three-phase inclusions in colorless, yellow, and blue sapphires from Sri Lanka. Gems & Gemology, Vol. 24, No. 2 (Summer), pp. 107-111.

Schrader, H. (1985). Inclusions in Corundum from Sri Lanka. Journal of the Gemmologists Association of Sri Lanka, No. 2 (October), pp. 37-41.

Sevillano-López, D. & González, F.J. (2011). Mining and minerals trade on the silk road to the ancient literary sources: 2 BC to 10 AD centuries In: Ortiz, J.E., Puche, O., Rábano, I. & Mazadiego, L.F. (Eds.) History of Research in Mineral Resources, pp. 43-60. Cuadernos del Museo Geominero, 13. Instituto Geológico y Minero de España, Madrid, 405 p. ISBN 978-84-7840-856-6. abstract

Silva, K.K.M.W. & Siriwardena, C.H.E.R. (1988). Geology and the origin of the corundum-bearing skarn at Bakamuna, Sri Lanka. Mineralium Deposita, Vol. 23, Issue 3 (July), pp. 186-190. abstract + references

Suwa, Y. (1993-2000). Gemstones - Quality & Value. Sekai Bunka Publishing, Inc., Tokyo, Japan. 3 Vols; Vol. 1 - 143 p., ISBN 4-418-99902-7; Vol. 2 - 144 p., ISBN 4-418-02902-8; Vol. 3 - 144 p., ISBN 4-418-01902-2.

Zirkel, F. (1870). Micromineralogische Mitteilungen: Gas- und Flüssigkeitseinschlüsse in Mineralien. Neues Jahrbuch für Mineralogie, Geologie und Palaeontologie. Schweizerische Mineralogische und Petrographische Mitteilungen. Band 50, Heft 1.

Zwaan, P.C. (1967). Solid Inclusions in Corundum and Almandine Garnet from Ceylon, Identified by X-ray Powder Photographs. The Journal of Gemmology, Vol. 10, No. 7, pp. 224-234.

Zwaan, P.C. (1982). Sri Lanka: The Gem Island. Gems & Gemology, Vol. 18, No. 2, pp. 62-71.

Switzerland

Gübelin, E.J. (1939). Die Mineralien im Dolomit von Campolungo. Special Edition of the "Schweizerische Mineralogische und Petrographische Mitteilungen", Vol. 19, 117 p.

Hughes, R.W. (1997). Switzerland In: Ruby & Sapphire, p. 410. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Tajikistan

Smith, C.P. (1998). Rubies and pink sapphires from the Pamir Mountain Range in Tajikistan, former USSR. The Journal of Gemmology, Vol. 26, No. 2, pp. 103-109.

Sorokina, E.S., Litvinenko, A.K., Hofmeister, W., Häger, T., Jacob, D.E. & Nasriddinov, Z.Z. (2015). Rubies and Sapphires from Snezhnoe, Tajikistan. Gems & Gemology, Vol. 51, No. 2 (Summer), pp. 160-175.

Tanzania

Abduriyim, A. & Kitawaki, H. (2008). New Geological Origin: Ruby from Winza of Tanzania, Part 1. GAAJ-Zenhokyo Online Report on Gemmological Association of All Japan

Abduriyim, A. & Kitawaki, H. (2008). New Geological Origin: Ruby from Winza of Tanzania, Part 2. GAAJ-Zenhokyo Online Report on Gemmological Association of All Japan

Anonymous (1995). Gem News: Sapphires from Tanzania. Gems & Gemology, Vol. 31, No. 1 (Spring), pp. 64-65.

Anonymous (1995). Gem News: Sapphires and other gems from Tanzania. Gems & Gemology, Vol. 31, No. 2 (Summer), pp. 133-134.

Chitty, W. (2009). A Study of Sapphires and Rubies from Tanzania’s Tunduru District. BSc Thesis in Gemology and Applied Mineralogy, Kingston University, London, 32 p.

Choudhary, G. (2008). Gem news international: An interesting zoned sapphire crystal from Winza, Tanzania. Gems & Gemology, Vol. 44, No. 3 (Fall), pp. 271-272.

Dirlam, D.M., Misiorowski, E.B. & Tozer, R., Stark, K.B. & Bassett, A.M. (1992). Gem wealth of Tanzania. Gems & Gemology, Vol. 28, No. 2 (Summer), pp. 80–102.

Game, P.M. (1954). Zoisite-amphibolite with corundum from Tanganyika. Mineralogical Magazine, Vol. 30, pp. 458-66. Mineralogical Magazine Tables of Contents

Gunawardene, M. (1984). Reddish-Brown Sapphires from Umba Valley, Tanzania. The Journal of Gemmology, Vol. 19, No. 2, April, pp. 139-144.

Hänni, H.A. (1986-7). On Corundums from Umba Valley, Tanzania. The Journal of Gemmology, Vol. 20, No. 5, pp. 278-284.

Hänny, H.A. (2008). Gem news international: New rubies from central Tanzania. Gems & Gemology, Vol. 44, No. 2 (Summer), pp. 177-178.

Hänni, H.A. (2008). New Rubies from Tanzania, SSEF Swiss Gemmological Institute Newsletter, May 2008. Also published on www.gemexpert.ch

Hänni, H.A. & Schmetzer, K. (1991). New Rubies from the Morogoro Area, Tanzania. Gems & Gemology, Vol. 27, No. 3 (Fall), pp. 156-167.

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1997). Tanzania In: Ruby & Sapphire, p. 410-418. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Hughes, R.W., Pardieu, V., Soubiraa, G., Rogers, M., Chitty, W., Chitty, M. & Brunot, P. (2011). Downtown: Gem hunting in Central & Southern Tanzania on www.ruby-sapphire.com

Johnson, M.L., Koivula, J.I., McClure, S.F. & DeGhionno, D. (Eds.) (1999). Gem News: Ruby from Songea, Tanzania. Gems & Gemology, Vol. 35, No. 4 (Winter), p. 215.

Johnson, M.L., Koivula, J.I., McClure, S.F. & DeGhionno, D. (Eds.) (1999). Gem News: Another source for bicolored sapphire: Tunduru, Tanzania. Gems & Gemology, Vol. 35, No. 4 (Winter), p. 215-216.

Kammerling, R.C., Johnson, M.L. & Liu, Y. (1996). An examination of colour-change sapphires from Tanzania. The Australian Gemmologist, Second Quarter, pp. 255-258.

Kammerling, R.C., Koivula, J.I. & Fritsch, E. (Eds.) (1995). Gem News: Sapphires and other gemstones from Tanzania. Gems & Gemology, Vol. 31, No. 2 (Summer), pp. 133-134.

Koivula, J.I., Kammerling, R.C. & Fritsch, E. (1992). Gem News: Faceted ruby from Longido. Gems & Gemology, Vol. 38, pp. 204.

Krzemnicki, M.S. & Hänni, H.A. (2008). New Tanzania mine uncovers source of exceptional rubies. InColor Magazine, International Colored Gemstone Association, Issue xx, p. 46-47. Also published on www.ssef.ch

Laurs, B.M. & Pardieu, V. (2008). Gem news international: Ruby and sapphire mining at Winza, Tanzania. Gems & Gemology, Vol. 44, No. 2 (Summer), pp. 177-178.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Pardieu, V. (2009). The Winza ruby and Sapphire mining area, Mpwapwa district, Dodoma province, Tanzania on www.fieldgemology.org

Pardieu, V. & Schwarz, D. (2008). Field Report from Winza, Gübelin GemLab experts travel to the Winza mines to investigate a new ruby find on www.diamonds.net

Pardieu, V. (2007). Tanzania, October 2007: A Gemological Safari (Part 1) on www.fieldgemology.org

Pardieu, V. (2007). Tanzania, October 2007: A Gemological Safari (Part 2) on www.fieldgemology.org

Peretti, A. (2008a). New Important Gem Discovery in Tanzania: The Tanzanian "Winza"-(Dodoma) Rubies. Contributions to Gemology, No. 7, 1st Ed., Gemresearch Swisslab (GRS), Bangkok, Thailand, xx p. ISBN 978-3-9523359-6-3. Also published on www.gemresearch.ch Video: New Winza Tanzania ruby mines visit Video: Magnificent Winza Tanzania rubies

Peretti, A. (2008b). Contributions to Gemology, No. 7: Winza Rubies Identified. 2nd Ed., Gemresearch Swisslab (GRS), Bangkok, Thailand 97 p. ISBN 978-3-9523359-7-0. Also published on www.gemresearch.ch

Senoble, J.B. (2008). An expedition to Tanzania’s new ruby deposit in Winza. InColor Magazine, International Colored Gemstone Association (ICA), 2008, p. 44-45. www.gemstone.org

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Schmetzer, K., Radl, W. & Schwarz, D. (2010). Rubies and sapphires from Winza, Tanzania - summary of characteristic properties and short update of the mining situation. The Australian Gemmologist, Vol. 24, No. 1, pp. 9-14.

Schwarz, D., Pardieu, V., Saul, J.M., Schmetzer, K., Laurs, B.M., Giuliani, G., Klemm, L., Malsy, A.-K., Erel, E., HauzenBerger, C., Du Toit, G., Fallick, A.E. & Ohnenstetter, D. (2008). Rubies and Sapphires from Winza, Central Tanzania. Gems & Gemology, Vol. 44, No. 4 (Winter), pp. 322–347.

Seifert, A.V. & Hyrsl, J. (1999). Sapphire and Garnet from Kalalani, Tanga Province, Tanzania. Gems & Gemology, Vol. 35, No. 2 (Summer), pp. 108-120.

Solesbury, F.W. (1967). Gem corundum pegmatites in NE Tanganyika. Economic Geology, Vol. 62, No. xx, pp. 983-91.

Swoboda, E.R. (Not dated; Retrieved March 16th 2014). Longido Ruby on www.palagems.com

Zwaan, P.C. (1974). Garnet, corundum and other gem minerals from Umba, Tanzania. Scripta Geologica, Vol. 20, pp. 19-30.

Thailand

Ali, S.H. & Dickinson DeLeon, S. (Not dated; Retrieved December 29th 2013). Case Study: Thailand's Gemstones on Gems and the Environment

Atichat, W. (1995). Spectroscopic approach to corundum from Chantaburi, Trat, and Kanchanaburi provinces, Thailand, by infrared spectroscopy. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 279-282, 289-291. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Bunopas, S. & Vella, P. (1992). Geotectonics and geological evolution of Thailand In: Piancharoen, C. (Ed.) Supplementary Volume of Proceedings of a National Conference on Geological Resources of Thailand. Department of Mineral Resources, Bangkok, Thailand, pp. 209-228.

Coenraads, R.R., Vichit, P. & Sutherland, F.L. (1995). An unusual sapphire-zircon-magnetite xenolith from the Chanthaburi Gem Province, Thailand. Mineralogical Magazine, Vol. 59, pp. 465-479. Mineralogical Magazine Tables of Contents

Gübelin, E.J. (1940). Differences Between Burma and Siam Rubies. Gems & Gemology, Vol. 3, No. 5 (Spring), pp. 69-72.

Gübelin, E.J. (1971). New Analytical Results of the Inclusions in Siam Rubies. The Journal of Gemmology, Vol. 12, No. 7, pp. 242-252.

Gunawardene, M. & Chawla, S.S. (1984). Sapphires from Kanchanaburi Province, Thailand. The Journal of Gemmology, Vol. 19, No. 3, July, pp. 228-239.

Guo, J.F., Griffin, W.L. & O'Reilly, S.Y. (1994). A cobalt-rich spinel inclusion in a sapphire from Bo Ploi, Thailand. Mineralogical Magazine, Vol. 58, No. 2, pp. 247-258. Mineralogical Magazine Tables of Contents

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1997). Thailand In: Ruby & Sapphire, p. 418-453. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Keller, P.C. (1982). The Chanthaburi-Trat Gem Field, Thailand. Gems & Gemology, Vol. 18, No. 4 (Winter), pp. 186-196.

Koivula, J.I. & Fryer, C.W. (1987). Sapphirine (not sapphire) in a ruby from Bo Rai, Thailand. The Journal of Gemmology, Vol. 20, No. 6, pp. 369-370.

Limitrakun, P., Zaw, K., Ryan, C.G. & Mernagh, T.P. (2001). Formation of the Denchai gem sapphires, northern Thailand: evidence from mineral chemistry and fluid/melt inclusion characteristics. Mineralogical Magazine, Vol. 65, No. 6, p. 725-735. abstract Mineralogical Magazine Tables of Contents

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Pisutha-Arnold, V., Wanthanakul, P., Intasopa, S. & Griffin, W.L. (1998). Corsilzirspite, a corundum-sillimanite-zircon-hercynite rock: New evidence on the origin of Kanchanburi sapphire, Thailand In: Ninth Regional Congress on Geology, Mineral and Energy Resources of South East Asia - GEOSEA 1998, pp. 95-96, Kuala Lumpur, Malaysia.

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Sutthirat, C., Saminpanya, S., Droop, G.T.R., Henderson, C.M.B. & Manning, D.A.C. (2001). Clinopyroxene-corundum assemblages from alkali basalt and alluvium, eastern Thailand: constraints on the origin of Thai rubies. Mineralogical Magazine, Vol. 65, No. 2, pp. 277-295.

Sutthirat, C., Charusiri, P., Farrar, E. & Clark, A. H. (1994). New 40Ar/39Ar geochronology and characteristics of some Cenozoic basalts in Thailand. In: Proceedings of the International Symposium on Stratigraphic Correlation of Southeast Asia, 15-20 November 1994, Bangkok, pp. 306-321. Department of Mineral Resources and IGCP 306, Bangkok, Thailand, 333 p. ISBN 9789747984453.

Suwa, Y. (1993-2000). Gemstones - Quality & Value. Sekai Bunka Publishing, Inc., Tokyo, Japan. 3 Vols; Vol. 1 - 143 p., ISBN 4-418-99902-7; Vol. 2 - 144 p., ISBN 4-418-02902-8; Vol. 3 - 144 p., ISBN 4-418-01902-2.

Vichit, P. (1992). Gemstones in Thailand In: Piancharoen, C. (Ed.) Supplementary Volume of Proceedings of a National Conference on Geological Resources of Thailand, pp. 124-150. Department of Mineral Resources, Bangkok, Thailand, xxx p.

USA (Montana is listed separately)

Barclay, C. (1939). Gem Sources of the South Atlantic States. Gems & Gemology, Vol. 3, No. 1 (Spring), pp. 9-10.

Barclay, C. (1939). Gem Sources of the South Atlantic States. Gems & Gemology, Vol. 3, No. 2 (Summer), pp. 27-28.

Bauer, M. (1904). Precious Stones. A popular account of their characters, occurrence and applications with an introduction to their determination, for mineralogists, lapidaries, jewellers, etc. with an appendix on pearls and coral, p. 279-282, 289-291. Translated by Spencer, L.J., 2 Vols., Reprinted by Dover Publications, Inc. 1968, 627 p. Vol. 1 - ISBN 0-486-21910-0; Vol. 2 - ISBN 0-486-21911-9.

Hughes, R.W. (1990). Corundum. Butterworth-Heinemann Ltd., London, UK, 314 p. ISBN 978-0-7506-1007-0.

Hughes, R.W. (1997). USA In: Ruby & Sapphire, pp. 434-473. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Pearl, R.M. (1939). The Gems of Colorado. Gems & Gemology, Vol. 3, No. 3 (Fall), pp. 39-40.

Pearl, R.M. (1939). The Gems of Colorado. Gems & Gemology, Vol. 3, No. 4 (Winter), pp. 59-60.

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Vietnam

Brown, G. (1992). Vietnamese ruby: a discriminatory problem for gemmologists. The Australian Gemmologist, May, pp. 43-46.

Brown, G. & Beattie, R. (1992). Vietnamese ruby fakes: a problem requiring urgent resolution. The Australian Gemmologist, November, pp. 108-114.

Dele-Dubois, M.L., Fournier, J. & Peretti, A. (1993). Rubis du Vietnam - Etudes comparative avec les rubis de Birmanie et d'autres provenances. Revue de Gemmologie, Association Francais de Gemmologie, No. 114 (March), pp. 7-10 (in French).

Garnier, V., Ohnenstetter, D., Giuliani, G., Fallick, A.E., Phan Trong, T., Hoàng Quang, V. & Schwarz, D. (2005). Basalt petrology, zircon ages and sapphire genesis from Dak Nong, southern Vietnam. Mineralogical Magazine, Vol. 69, No. 1, pp. 21-38. Mineralogical Magazine Tables of Contents

Garnier, V., Ohnenstetter, D., Giuliani, G., Maluski, H., Deloule, E., Phan Trong, T., Pham Van Long & Hoàng Quang, V. (2005). Age and significance of ruby-bearing marble from the Red River Shear Zone, Northern Vietnam. The Canadian Mineralogist, Vol., Vol. 43, pp. 1315-1329. The Canadian Mineralogist Tables of Contents

HauzenBerger, C.A., Häger, T., Hofmeister, W., Quang, V.X. & Rohan Fernando, G.W.A. (2003). Origin and formation of gem quality corundum from Vietnam. Geo- and Material-Science on Gem-Minerals of Vietnam. Proceedings of the International Workshop on Material Characterization by Solid State Spectroscopy: Gems and Minerals of Vietnam, Hanoi, October 1 - 8, 2003.

Henn, U. & Bank, H. (1991). Rubine aus Vietnam. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 40, No.1, pp. 25-28.

Hofmeister, W. (2001). Interpretation of some Typical Vietnamese Gem Mineralizations In: Hofmeister, W., Dao, N.Q. & Quang, V.X. (Eds.). Proceedings of the International Workshop on Material Characterization by Solid State Spectroscopy: The Minerals of Vietnam, pp. 1-9, Hanoi, April 4 - 10, 2001.

Hughes, R.W. (1997). Vietnam In: Ruby & Sapphire, pp. 473-483. RWH Publishing, Boulder, CO, USA, 511 p. ISBN 0-9645097-6-8. www.ruby-sapphire.com

Kane, R.E., McClure, S.F., Kammerling, R.C., Khoa, N.D., Mora, C., Repetto, S., Khai, N.D. & Koivula, J.I. (1991). Rubies and Fancy Sapphires from Vietnam. Gems & Gemology, Vol. 27, No. 3 (Fall), pp. 136-155.

Khoi, N.N., Sutthirat, C., Tuan, D.A., Van Nam, N., Thuyet, N.T.M. & Nhung, N.T. (2011). Ruby and sapphire from the Tan Huong-Truc Lau area, Yen Bai Province, Northern Vietnam. Gems & Gemology, Vol. 47, No. 3 (Fall), pp. 182-195.

Khotchanin, K., Thanasuthipitak, K. & Thanasuthipitak, T. (2009). The structure and chemical composition of trapiche blue sapphire from Southern Vietnam and Cambodia. Journal of the Gemmological Association of Hong Kong, Vol. 30, pp. 25–35. Journal of the Gemmological Association of Hong Kong

Lapngamchana, S. & Suthirat, C. (2009). Gem-Bearing Marble from Luc Yen Deposit, Yen Bai, Northern Vietnam. BEST, Vol. 2, No. 1/2, pp. 84-86.

Le Thi-Thu Huong, Häger, T., Hofmeister, W., HauzenBerger, C., Schwarz, D., Pham Van Long, Wehmeister, U., Khoi, N.N. & Nhung, N.T. (2012). Gemstones from Vietnam. An Update. Gems & Gemology, Vol. 48, No. 3 (Fall), pp. 158-176.

Michelou, J.C. & Lipatapanlop, B. (Eds.) (2006). The ICA 2006 World Colored Gemstone Mining Report. InColor Magazine, International Colored Gemstone Association (ICA), Spring 2006, 58 p. www.gemstone.org

Pham Van Long, Vinh, H.Q. & Nghia, N.X. (2004). Inclusions in Vietnamese Quy Chau Ruby and their Origin. The Australian Gemmologist, Vol. 22, No. 2, pp. 67-71.

Pham Van Long, Giuliani, G., Garnier, V. & Ohnenstetter, D. (2004). Gemstones in Vietnam. The Australian Gemmologist, Vol. 22, No. 4 (October-December), pp. 162-168. Also published on www.palagems.com

Pham Van Long, Hoang Quang, V., Garnier, V., Giuliani, G., Ohnenstetter, D., Lhomme, T., Schwarz, D., Fallick, A., Dubessy, J. & Phan Trong, T. (2004). Gem corundum deposits in Vietnam. The Journal of Gemmology, Vol. 29, No. 3, pp. 129-147. abstract

Poirot, J.P. (1997). Rubis et saphirs du Viet-Nam. Revue de Gemmologie, Association Française de Gemmologie, No. 131, pp. 3-5 (in French).

Pracucci, F. (1994). Le rubis de Luc Yen (Vietnam). Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Smith, C.P., Kammerling, R.C., Keller, A.S., Peretti, A., Scarratt, K. V., Khoa, N.D. & Repetto, S. (1995). Sapphires from Southern Vietnam. Gems & Gemology, Vol. 31, No. 3 (Fall), pp. 168-186.

Sutthirat, C., Lapngamchana, S., Pisutha-Arnond, V. & Khoi, N.N. (2008). Petrography and Some Mineral Chemistry of Gem-Bearing Marble from Luc Yen Gem Deposit, Northern Vietnam. Proceedings of the International Symposia on Geoscience Resources and Environments of Asian Terranes (GREAT 2008), 4th IGCP 516, and 5th APSEG; November 24-26, 2008, Bangkok, Thailand, pp. 283-288.

Padparadscha

Crowningshield, R.. (1983). Padparadscha: What’s in a name? Gems & Gemology, Vol. 19, No. 1 (Spring), pp. 30–36.

Fryer, C. (1986). Gem Trade Lab Notes: Sapphire, pinkish-orange ("Padparadscha"). Gems & Gemology, Vol. 22, No. 1 (Spring), pp. 52-53.

Hughes, R.W. (2005-2012). The Ownership of Words: An essay on the meaning of padparadscha, published on www.ruby-sapphire.com

Hughes, R.W. (Not dated; Retrieved December 29th 2013). Walking the line in ruby & sapphire, published on www.palagems.com

Jomard, C. (1996). Le padparadscha - Etude étymologique. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes, 64 p. (in French). Published on www.gemnantes.fr

Notari, F. (1996). Le padparadscha - Etude scientifique. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes, 95 p. (in French). Published on www.gemnantes.fr

Notari, F. (1997). Le saphir "Padaparadscha". Revue de Gemmologie, Association Française de Gemmologie, No. 132, pp. 24-27 (in French).

Roskin, G. (2002). AGTA Lab Has New Padparadscha ID, published on JCK Online

Spectroscopic Research

Atichat, W. (1995). Spectroscopic approach to corundum from Chantaburi, Trat, and Kanchanaburi provinces, Thailand, by infrared spectroscopy. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Bolfan-Casanova, N., Keppler, H. & Rubie, D.C. (2002). Hydroxyl in MgSiO3 akimotoite: A polarized and high-pressure IR study. American Mineralogist, Vol. 87, pp. 603-608. abstract
American Mineralogist Tables of Contents

Bosshart, G. (1982). Distinction of natural and synthetic rubies by ultraviolet spectrophotometry. The Journal of Gemmology, Vol. 18, No. 2, pp. 145-160.

Bosshart, G. & Schmetzer, K. (1986). Spectrophotometric measurements of faceted rubies: critical review of an immersion technique. The Journal of Gemmology, Vol. 20, No. 4, pp. 238-239.

Calligaro, T., Mossman, A., Poirot, J.-P. & Querre, G. (1998). Provenance study of rubies from a Parthian statuette by PIXE analysis. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 136-138 (March), pp. 846-850.

Calligaro, T., Poirot, J.-P. & Querre, G. (1999). Trace element fingerprinting of jewellery rubies by external beam PIXE. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 150, Issues 1-4 (April), pp. 628-34. abstract

David, C. & Fritsch, E. (2001). Identification du traitement thermique à haute temperature des corindons par spectrométrie infra-rouge. Revue de Gemmologie, Association Française de Gemmologie, No. 141/142 (Janvier/Février), pp. xxx-xxx (in French).

Eigenmann, K. & Günthard, H. (1972). Valence states, redox reactions and biparticle formation of Fe and Ti doped sapphire. Chemical Physics Letters, Vol. 13, Issue 1 (February), pp. 58-61. abstract

Eigenmann, K., Kurtz, K. & Günthard, H.H. (1972). The optical spectrum of α-Al2O3:Fe3+. Chemical Physics Letters, Vol. 13, Issue 1 (February), pp. 54-57. abstract

Farmer, V.C. (Editor) (1974). The infrared spectra of minerals. Mineralogical Society Monograph 4, Mineralogical Society, London, U.K., x + 539 p.

Faye, G.H. (1971). On the optical spectra of di-and trivalent iron in corundum: a discussion. American Mineralogist, Vol. 56, pp. 344-348. American Mineralogist Tables of Contents

Ferguson, J. & Fielding, P.E. (1971). The origins of the colours of yellow, green and blue sapphires. Chemical Physics Letters, Vol. 10, Issue 3 (August), pp. 262-265. abstract

Ferguson, J. & Fielding, P.E. (1972). The orgins of the colours of natural yellow, blue, and green sapphires. Australian Journal of Chemistry, Vol. 25, Issue 7, pp. 1371-1385. abstract

Fontana, I., Le Donne, A., Palanza, V., Bineti, S. & Spinolo, G. (2008). Optical spectroscopy study of type 1 natural and synthetic sapphires. Journal of Physics Condensed Matter, Vol. 20, Issue 12, pp. 125228-125232.

Guillong, M. & Gunther, D. (2001). Quasi 'non-destructive' laser ablation-inductively coupled plasma-mass spectrometry fingerprinting of sapphires. Spectrochimica Acta Part B: Atomic Spectroscopy, Vol. 56, Issue 7 (July), pp. 1219-1231. abstract

Goto, T., Ahrens, T.J. & Rossman, G.R. (1979). Absorption spectra of Cr3+ in Al2O3 under shock compression. Physics and Chemistry of Minerals, Vol. 4, Issue 3 (July), pp. 253-263. abstract + references

Hänni, H.A., Kiefert, L., Chalain, J.-P. & Wilcock, I.C. (1997). A Raman Microscope in the Gemmological Laboratory: First Experiences of Application. The Journal of Gemmology, Vol. 25, No. 6, pp. 394-406. Also published on www.ssef.ch

Jarvis, K.E. & Williams, J.G. (1993). Laser Ablation inductively coupled plasma mass spectrometry (LA-ICP-MS): a rapid technique for the direct, quantitative determination of major, trace and rare-earth elements in geological samples. Chemical Geology, Vol. 106, Issues 3-4 (June), pp. 251-262. abstract

Joseph, D., Lal, M., Shinde, P.S. & Padalia, B.D. (2002). Characterisation of gem stones (rubies and sapphires) by energy-dispersive X-ray fluorescence. X-Ray Spectrometry, Vol. 29, Issue 2 (March/April), pp. 147-50. abstract

Krebs, J.J. & Maisch, W.G. (1971). Exchange effects in the optical-absorption spectrum of Fe3+ in Al2O3. Physical Review B, Vol. 4, Issue 3 (August), pp. 757-769. abstract

Krzemnicki, M.S., Hänni, H.A. & Walters, R.A. (2004). A new method for detecting Be diffusion-treated sapphires: Laser-induced Breakdown Spectroscopy (LIBS). Gems & Gemology, Vol. 40, No. 4 (Winter), pp. 314-322.

Krzemnicki, M.S., Hänni, H.A., Walters, R.A. & Chalain, J.-P. (2005). Une nouvelle méthode pour la detection des corindons traits par diffusion du beryllium: Laser-induced Breakdown Spectroscopy (LIBS). Revue de Gemmologie, Association Française de Gemmologie, No. 152, (Juin), pp. xxx-xxx (in French). Also published on www.ssef.ch

Lehmann, G. (1971). On the optical spectra of di- and trivalent iron in corundum: A reply. American Mineralogist, Vol. 56, pp. 349-350. American Mineralogist Tables of Contents

Lehmann, G. & Harder, H. (1970). Optical spectra of di- and trivalent iron in corundum. American Mineralogist, Vol. 55 (January-February), pp. 98-105. American Mineralogist Tables of Contents

Liebach, R., Dobbie, J., Hutton, D.R. & Troup, G.J. (1988). ESR and optical spectra of Mn2+ sapphire. The Journal of Gemmology, Vol. 21, No. 4, pp. 227-231.

Mason, P.R.D., Jarvis, K.E., Downes, H. & Vannucci, R. (1999). Determination of incompatible trace elements in mantle clinopyroxenes by LA-ICP-MS: A comparison of analytical performance with established techniques. Geostandards Newsletter, Vol. 23, Issue 2 (December), pp. 157-172. abstract

Massi, L. (2005). Les corindons à changement de couleur. Revue de Gemmologie, Association Française de Gemmologie, No. 152 (Juin), pp. xxx-xxx (in French).

McClure, D.S. (1962). Optical spectra of transition-metal ions in corundum. The Journal of Chemical Physics, Vol. 36, pp. 2757-2779. abstract

McClure, D.S. (1963). Comparison of the crystal fields and optical spectra of Ce2O3 and ruby. The Journal of Chemical Physics, Vol. 38, Issue 9, pp. 2757-2779. abstract

Mouchun, H., Xuanmin, Z. & Bin, H. (2001). Raman spectrum feature of ruby from Yuanjiang Yunnan Province. The Journal of Gemmology, Vol. 3, No. 4, pp. 25-27.

Muhlmeister, S., Fritsch, E., Shigley, J.E., Devouard, B. & Laurs, B.M. (1998). Separating Natural and Synthetic Rubies on the Basis of Trace-Element Chemistry. Gems & Gemology, Vol. 34, No. 2 (Summer), pp. 80-101.

Nikolskaya, L.V., Terekhova, V.M. & Samoilovich, M.I. (1978). On the origin of natural sapphire color. Physics and Chemistry of Minerals, Vol. 3, Issue 3 (September), pp. 213-224. abstract + references

Osipowicz, T., Tay, T.S., Orlic, I., Tang, S.M. & Watt, F. (1995). Nuclear microscopy of rubies - trace elements and inclusions. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 104, Issues 1-4 (September), pp. 590-594. abstract

Poirot, J.-P. (1992). Spectrometry and x-ray fluorescence of sapphires. Gemmologie: Zeitschrift Der Deutschen Gemmologischen Gesellschaft, Vol. 41, pp. 172-173 (in German).

Ponahlo, J. (2002). Inclusions in Gemstones: Their Cathodoluminescence (CL) and CL Spectra. The Journal of Gemmology, Vol. 28, No. 2, pp. 85-100.

Rankin, A.H., GreenWood, J. & Hargreaves, D. (2003). Chemical fingerprinting of some East African gem rubies by laser ablation ICP-MS. The Journal of Gemmology, Vol. 28, No. 8, pp. 473-482.

Ruan Y., Dou Y., Li, Y. & Liu, H. (1996). Study on the color origin and decoloration of Shandong sapphire. Guisuanyan Xuebao, Vol. 24, pp. 203-208 (in Chinese).

Rumyantsev, V.N., Grum-Grzhimailo, S.V. & Boksha, O.N. (1971). Optical absorption spectra of hydrothermal corundum crystals containing impurities. Soviet Physics, Crystallography, Vol. 16, pp. 373-374. Translated from Kristallographie, Vol. 16, pp. 445-447.

Saminpanya, S., Manning, D.A.C., Droop, G.T.R. & Henderson, C.M.B. (2003). Trace elements in Thai gem corundums. The Journal of Gemmology, Vol. 28, No. 7, pp. 399-415. abstract

Segura, O. (2013). La luminescence orange des corindons. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Schmetzer, K. (1987). Zur Deutung der Farbursache blauer Saphire - eine Diskussion. Neues Jahrbuch für Mineralogie, Monatshefte, Vol. 1987, pp. 337-343 (in German).

Schmetzer, K. & Bank, H. (1980). Explanations of the absorption spectra of natural and synthetic Fe- and Ti-containing corundums. Neues Jahrbuch für Mineralogie, Abhandlungen, Vol. 139, pp. 216-225 (in German).

Schmetzer, K. & Bank, H. (1981). Die Farbursachen und Farben der Mineralart Korund. Gemmologie: Zeitschrift Der Deutschen Gemmologischen Gesellschaft, Vol. 31, pp. 265-280 (in German).

Schmetzer, K. & Bank, H. (1981). The color of natural corundum. Neues Jahrbuch für Mineralogie, Monatshefte, Vol. 1981, pp. 59-68 (in German).

Schmetzer, K., Bosshart, G. & Hänni, H.A. (1982). Naturally-coloured and treated yellow and orange-brown sapphire. The Journal of Gemmology, Vol. 18, No. 7, pp. 607-622. Also published on www.ssef.ch

Siripaisarnpipat, S., Pattharakorn, T., Pattharakorn S., Sanguantuang, S., Koonsaeng, N., Achiwawanich, S., Pomsurin, M. & Hanmungthum, P. (2002). Spectroscopic properties of Möng Hsu rubies. The Australian Gemmologist, Vol. 21, No. xx (xxx), pp. 236-241.

Smith, C.P. (1995). A contribution to understanding the infrared spectra of rubies from Möng Hsu, Myanmar. The Journal of Gemmology, Vol. 24, No. 5, pp. 321-335. Also published on www.gemologyonline.com

Smith, C.P. (1996). Introduction to Analyzing Internal Growth Structures: Identification of the Negative d Plane in Natural Ruby. Gems & Gemology, Vol. 32, No. 3 (Fall), pp. 170-184.

Sorby, H.C. (1858). On the microscopic structure of crystals indicating the origin of minerals and rocks. Journal of the Geological Society, Vol. 14, pp. 453-500. Also published by Taylor & Francis, London. 48 p., 111 illustrations on 4 plates.

Stern, B.W. (1984). Zur Simultananalyse von Silkaten (Hauptkomponenenten, Spuren) mittels energie-dispersiver Röntgenfluoreszenz-Spektrometrie (EDS-XFA). Fresenius' Zeitschrift für Analytische Chemie, Vol. 320, Issue 1 (January), pp. 6-14 (in German). abstract

Sutthirat, C., Charusiri, P., Farrar, E. & Clark, A. H. (1994). New 40Ar/39Ar geochronology and characteristics of some Cenozoic basalts in Thailand. In: Proceedings of the International Symposium on Stratigraphic Correlation of Southeast Asia, 15-20 November 1994, Bangkok, pp. 306-321. Department of Mineral Resources and IGCP 306, Bangkok, Thailand, 333 p. ISBN 9789747984453.

Taran, M.N. & Langer, K. (1998). Temperature and pressure dependencies of intervalence charge transfer bands in spectra of Fe- and Fe,Ti-bearing oxygen-based minerals. Neues Jahrbuch für Mineralogie, Abhandlungen, Vol. 172, Isuue 2-3 (May), pp. 325-346. abstract

Tang, S.M., Tang S.H., Mok, K.F. & Tay T.S. (1989). A study of natural and synthetic rubies by PIXE. Applied Spectroscopy, Vol. 43, No. 2, pp. 219-223.

Tang S.M., Tang S.H., Tay, T.S. & Retty, A.T. (1988). Analysis of Burmese and Thai rubies by PIXE. Applied Spectroscopy, Vol. 42, No. 1, pp. 44-48.

Thilo, E., Jander, J. & Seeman, H. (1955). Die Farbe des Rubins und der (Al,Cr)2O3-Mischkristalle. Zeitschrift für anorganische und allgemeine Chemie, Vol. 279, Issue 1-2, (March), pp. 2–17 (in German). abstract

Themelis, T. (2004). LIBS: A Spark of Inspiration in Gemmological Analytical Instrumentation. The Australian Gemmologist, Vol. 22, No. 4 (October-December), pp. 138-145.

Tippens, H.H. (1970). Charge-transfer spectra of transition-metal ions in corundum. Physical Review, Vol. B, Issue 1 (January), pp. 126-135. abstract

Townsend, M.G. (1968). Visible charge-transfer band in blue sapphire. Solid State Communications, Vol. 6, Issue 2 (January), pp. 81-83. abstract

Orgel, L.E. (1957). Ion compression and the colour of ruby. Nature, Vol. 179 (June), p. 1348.

Wefers, K. & Misra, C. (1987). Oxides and Hydroxides of Alumina. Alcoa Research Laboratories Technical Paper No. 19, Revised. Alcoa Research Laboratories, St. Louis, MO., 92 p.

Yaxley, G.M. & Kamenetsky, V. (1999). In situ origin for glass in mantle xenoliths from southeastern Australia; insights from trace element compositions of glasses and metasomatic phases. Earth and Planetary Science Letters, Vol. 172, Issues 1-2 (October), pp. 97-109. abstract

Synthetics

Anderson, B.W. (1949). Reconstructed Rubies. Gems & Gemology, Vol. 6, No. 6, pp. 187-190.

Anderson, B.W. (1967). Curved Striae under Short-Wave Ultra-Violet. The Journal of Gemmology, Vol. 10, No. 6, p. 199.

Anderson, B.W. (1980). Special Methods for Distinguishing Natural Corundums from Synthetics. Retail Jeweller, Vol. 19, No. 456, p. 8.

Anderson, B.W. (1981). Kashan Identification. Gemological Research Group, Inc., June, pp. A-J.

Anderson, B.W. (1982). Is it really a Kashan? Jewelers' Circular-Keystone, Vol. 153, No. 3, pp. 54-58.

Balitsky, V.S. (2000). Present Russian Synthetic and Enhanced Gemstones. The Australian Gemmologist, Vol. 20, No. 11, pp. 458-466.

Barta, C. (1957). Why Synthetic Corundum Boules Split. The Gemmologist, Vol. 26, No. 317, pp. 219-224.

Benson, L.B. (1952). Many "Reconstructed Rubies" found to be Synthetic Corundum. Gems & Gemology, Vol. 7, No. 5, pp. 139-144, 166.

Brown, G. (1984). Inclusions in Synthetic Corundum by Chatham. The Australian Gemmologist, Vol. 15, No. 5, pp. 149-154.

Brown, G. (1985). Seiko Synthetics. The Australian Gemmologist, Vol. 15, No. 11, pp. 418-420.

Brown, G. (1986). Corundum Doublets. The Canadian Gemmologist, Vol. 7, No. 1, pp. 2-8.

Bruder, R. (1996). Charakterisierung von Saphiren mit Hilfe von Flüssigkeitseinschlüssen. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 45, No. 2, pp. 47-54 (in German).

Burch, C.R. (1984). Some Observations on a Kashan Synthetic Ruby. The Journal of Gemmology, Vol. 19, No. 1, pp. 54-61.

Burch, C.R. (1987). Metallic Inclusions in Chatham Synthetic Corundums. The Journal of Gemmology, Vol. 20, No. 5, pp. 267-269.

Chauhan, M. (2013). Gem News International: Phosphorescence in Synthetic Sapphire. Gems & Gemology, Vol. 49, No. 3 (Fall), pp. 182-183.

Choudhary, G. (2009). Synthetic sapphires with 'natural-like' sheen. Gems & Jewellery, Vol. 18, No. 3, pp. 6-9. Also published on www.gem-passion.com

Crowningshield, R.. (1969-1970). Flux-Grown Synthetic Rubies. Gems & Gemology, Vol. 13, No. 4 (Winter), pp. 112-117.

Duroc-Danner, J.M. (1985). Polysynthetic Twin Lamellae in Synthetic Verneuil Sapphire. The Journal of Gemmology, Vol. 19, No. 6, pp. 479-483.

Duroc-Danner, J.M. (2002). Verneuil synthetic sapphire showing an iron absorption spectrum. The Journal of Gemmology, Vol. 28, No. 4, pp. 188-202.

Duroc-Danner, J.M. (2003). A Verneuil synthetic ruby showing diverse veil-like ‘fingerprints’. The Journal of Gemmology, Vol. 28, No. 8, pp. 483-488.

Dona, M. (1987). Le rubis: naturel ou synthétique? Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes, 83 p. (in French). Published on www.gemnantes.fr

Elen, S. & Fritsch, E. (1999). The Separation of Natural from Synthetic Colorless Sapphire. Gems & Gemology, Vol. 35, No. 1 (Spring), pp. 30-41.

Elwell, D. (1979). Man-Made Gemstones. Ellis Horwood Ltd., West Sussex, U.K., 191 p., ISBN 0-85312-128-1 (Ellis Horwood) | ISBN 0-470-26606-6 (Halsted Press).

Eppler, W.F. (1958). Synthetischer Smaragd. Deutsche Goldschmiede Zeitung, Nr. 4, pp. xxx-xxx (in German).

Eppler, W.F. (1964). Polysynthetic Twinning in Synthetic Corundum. Gems & Gemology, Vol. 11, No. 6, pp. 169-174/191.

Farn, A.E. (1963). Testing a Ruby. The Journal of Gemmology, Vol. 9, No. 3, pp. 75-82.

Free, J., Free, I., Brown, G. & Linton, T. (1999). Verneuil Synthetic Corundums with Induced "Fingerprints". The Australian Gemmologist, Vol. 20, No. 8, pp. 342-347.

Goodger, W.D. (1986). A Few Hints on Identifying Synthetic Rubies. The Canadian Gemmologist, Vol. 7, No. 2, Summer, pp. 56-57.

Gübelin, E.J. (1942). Genuine Type Inclusions in New European Synthetics. Gems & Gemology, Vol. 4, No. 2 (Summer), pp. 18-21.

Gübelin, E.J. (1960-61). More Light on Beryls and Rubies with Synthetic Overgrowth. Gems & Gemology, Vol. 10, No. 4 (Winter), pp. 105-113.

Gübelin, E.J. (1961). Hydrothermal Rubies and Emerald-Coated Beryl. The Journal of Gemmology, Vol. 8, No. 2, pp. 49-63.

Gübelin, E.J. (1982). Erkennungsmerkmale der neuen synthetischen Rubine. Goldschmiede Zeitung, No. xx (May), pp. 53-59 (in German).

Gübelin, E.J. (1982). New Synthetic Rubies made by Professor P. O. Knischka. Gems & Gemology, Vol. 18, No. 3 (Fall), pp. 165-168.

Gübelin, E.J. (1983). Identification of the New Synthetic and Treated Sapphires. The Journal of Gemmology, Vol. 18, No. 8, pp. 677-706.

Gübelin, E.J. (1983). The Recognition of the New Synthetic Rubies. The Journal of Gemmology, Vol. 18, No. 6, April, pp. 477-499.

Gübelin, E.J. (1986). Die diagnostischen Eigenschaften der neuesten Synthesen. Goldschmiede Zeitung, No. 11 (November), pp. 69-76 (in German).

Gunawardene, M. (1983). Synthetic Ruby Made by Knischka. The Journal of Gemmology, Vol. 18, No. 5, pp. 365-378.

Gunawardene, M. (1984). "Ramaura" A New Synthetic Ruby Made in U.S.A.. The Journal of Gemmology, Vol. 19, No. 2 (April), pp. 125-138.

Gunawardene, M. (1984). A Close Examination of Platinum Inclusions in Chatham Blue and Orange Sapphires>. Journal of the Gemmological Association of Sri Lanka, No. 1, October, pp. 33-37.

Gunawardene, M. (1984). Identification Characteristics of Synthetic Ruby Made by Knischka. The Lapidary Journal, Vol. 37, No. 12 (March), pp. 1700-1706.

Gunawardene, M. (1985). Gemmological Properties of Synthetic Corundums Coated by Lechleitner. The Journal of Gemmology, Vol. 19, No. 7, pp. 557-570.

Gunawardene, M. (1985). Identification Characteristics of Flux Grown Synthetic Orange Sapphires. The Journal of Gemmology, Vol. 19, No. 5, pp. 389-403.

Halford-Watkins, J.F. (1934). Synthetic Corundum, Part 1. The Gemmologist, Vol. 3, No. 34, pp. 302-311.

Halford-Watkins, J.F. (1934). Synthetic Corundum, Part 2. The Gemmologist, Vol. 3, No. 35, pp. 333-341.

Hänni, H.A. (1984). Testing the Authenticity of Corundum - Methods and Limitations. Swiss Watch and Jewellery, No. 3 (March), pp. 461-467.

Hänni, H.A., Schmetzer, K. & Bernhardt, H.-J. (1994). Synthetic Rubies by Douros: A New Challenge for Gemologists. Gems & Gemology, Vol. 30, No. 2 (Summer), pp. 72-86.

Henn, U. & Schrader, H.-W. (1985). Some Aspects of Identification of Kashan Synthetic Rubies. The Journal of Gemmology, Vol. 19, No. 6, pp. 469-478.

Henn, U. & Bank, H. (1993). Flux-Grown Synthetic Rubies from Russia. The Journal of Gemmology, Vol.23, No.7, pp. 393-396.

Hosaka, M. (1990). Hydrothermal Growth of Gem Stones and Their Characterization. Progress in Crystal Growth and Characterization of Materials, Vol. 21, Issues 1-4, pp. 71-96. preview

Johnson, M.L., Mercer, M. E., Fritsch, E., Maddison, P. & Shigley, J.E. (1995). "Ti-Sapphire": Czochralski-Pulled Synthetic Pink Sapphire from Union Carbide. Gems & Gemology, Vol. 31, No. 3 (Fall), pp. 188-195.

Kammerling, R.C. & Koivula, J.I. (1990). Tips on Identifying Flame-fusion Synthetics. The Scope, Vol. 5, No. 2.

Kammerling, R.C. & Koivula, J.I. (1994). Microscopic Features of Synthetic Rubies, Part 1: Melt Products. The Canadian Gemmologist, Vol. 15, No. 3, pp. 82-85.

Kammerling, R.C. & Koivula, J.I. (1994). Microscopic Features of Synthetic Rubies, Part 2: Flux-Growth Products. The Canadian Gemmologist, Vol. 15, No. 4, pp. 104-108.

Kammerling, R.C., Fritsch, E. & Koivula, J.I. (1995). Swarogem's new synthetic ruby with induced fingerprints. Jewellery News Asia, No. 127 (March), pp. 70-76. www.jewellerynewsasia.com

Kammerling, R.C., Koivula, J.I. & Fritsch, E. (1994). An examination of Chatham flux-grown synthetic pink sapphires. The Journal of Gemmology, Vol. 24, No. 3, pp. 149-154.

Kammerling, R.C., Koivula, J.I. & Weldon, R. (1991). Identificacion de gemas sinteticas fabricadas por fusion a la llama (metodo Verneuil). Boletin del Instituto Gemologico Espanol, Vol. 33 (Diciembre), pp. 32-37. (In Spanish).

Kane, R.E. (1982). The Gemological Properties of Chatham Flux-Grown Synthetic Orange Sapphire and Synthetic Blue Sapphire. Gems & Gemology, Vol. 18, No. 3 (Fall), pp. 140-153.

Kane, R.E. (1983). The Ramaura Synthetic Ruby. Gems & Gemology, Vol. 19, No. 3 (Fall), pp. 130-148.

Kane, R.E. (1985). A Preliminary Report on the New Lechleitner Synthetic Ruby and Synthetic Blue Sapphire. Gems & Gemology, Vol. 21, No. 1 (Spring), pp. 35-39.

Kiefert, L. (1987). Mineralogische Untersuchungen zur Charakterisierung und Unterscheidung natürlicher und synthetischer Sapphire. Diplomarbeit, Universität Heidelberg, 203 p (in German).

Kiefert, L. & Schmetzer, K. (1988). Morphology and Twinning in Chatham Synthetic Blue Sapphire. The Journal of Gemmology, Vol. 21, No. 1, pp. 16-22.

Knischka, P.O. & Gübelin, E.J. (1980). Synthetische Rubine mit Edelsteinqualitat, isometrischem Habitus und hoher Zahl unbeschadigter Kristallflachen. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 29, No. 3-4, pp. 155-186 (in German).

Koivula, J.I. (1980-1981). Brief Notes on Chatham Flux Sapphires. Gems & Gemology, Vol. 16, No. 1-2, pp. 410-411.

Koivula, J.I. (1984). Gem News: Seiko Growing Synthetic Gemstones by the Floating-Zone Method. Gems & Gemology, Vol. 20, No. 1 (Spring), p. 60.

Koivula, J.I. (1986). Natural vs. Synthetic Ruby Separations. Guilds: 52 Annual Conclave Issue, pp. 37-38.

Koivula, J.I. & Kammerling, R.C. (1988). A Gemological Look at Kyocera's New Synthetic Star Ruby. Gems & Gemology, Vol. 24, No. 4 (Winter), pp. 237-240.

Koivula, J.I., Kammerling, R.C. & Fritsch, E. (1993b). Two interesting “double star” sapphires. The Australian Gemmologist, Vol. 18, No. 7, pp. 235-236.

Koivula, J.I., Tannous, M. & Schmetzer, K. (2000). Synthetic Gem Materials and Simulants in the 1990s. Gems & Gemology, Vol. 36, No. 4 (Winter), pp. 360-379.

Kunz, G.F. (1887). The New Artificial Rubies. Journal of the New-York Microscopical Society, Vol. 3, No. 4, pp. 55-59.

Liddicoat, R.T. (1946). Identification of Synthetic Gems: Part 1 - The Detection of Synthetic Corundum. Gems & Gemology, Vol. 5, No. 7, pp. 349-354.

Linton, T. (1997). Detecting synthetic yellow sapphire. The Australian Gemmologist, Last Quarter, pp. 510-511 (page 509 missing from original copy).

Lu, T. & Shigley, J.E. (1998). Optical Characterization of Synthetic Faceted Gem Materials Grown from Hydrothermal Solutions. Proceedings of SPIE, Vol. 3425, pp. 37-45. abstract

Lu, R. (2013). Lab Notes: Yellow Synthetic Sapphire Colored by Trapped-Hole Mechanism. Gems & Gemology, Vol. 49, Issue 1 (Spring), pp. 50-51.

Milisenda, C.C. & Reznichenko, E. (2003). Hydrothermal hergestellte synthetische Korunde aus Russland. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 52, No. 1, pp. 31-36 (in German).

Nash, J. & Skuratowicz, A. (2002). True Colors: Distinguishing Natural Ruby, Sapphire, and Emerald from Synthetics and Imitations. American Jewelry Manufacturer, Vol. 47, No. 2, pp. 28-32, 35-40.

Nassau, K. (1980). Gems Made by Man. Gemological Institute of America, Santa Monica, California, USA, 364 p., ISBN 0-8733-016-1.

Nassau, K. (1990). Synthetic Gem Materials in the 1980s. Gems & Gemology, Vol. 26, No. 1 (Spring), pp. 50-63.

O'Donoghue, M. (1983). Identifying Man-made Gems. N.A.G. Press, London, U.K., 223 p., ISBN 7189-0111-7.

Peretti, A., Mullis, J., Mouawad, F. & Guggenheim, R. (1997). Inclusions in synthetic rubies and synthetic sapphires produced by hydrothermal methods (Tairus, Novosibirsk, Russia). The Journal of Gemmology, Vol. 25, No. 5, pp. 149-157.

Peretti, A., Mullis, J., Mouawad, F. & Guggenheim, R. (1997). Inclusions in Synthetic Rubies and Synthetic Sapphires produced by Hydrothermal Methods (Tairus, Novosibirsk, Russia). The Journal of Gemmology, Vol. 25, No. 8, pp. 540-561.

Peretti, A. & Smith, C.P. (1993). A new type of synthetic ruby on the market: offered as hydrothermal rubies from Novosibirsk. The Australian Gemmologist, Vol. 18, No. xx (February), pp. 149-156.

Peretti, A. & Smith, C.P. (1993). An in-depth look at Russia's hydrothermal synthetic rubies. JewelSiam, April-May, pp. 96-102.

Peretti, A. & Mullis, J. (1997). Distinction of natural and synthetic rubies by fluid inclusion analyses. XIV Ecrofi, European Current Research on Fluid inclusions, Abstracts, Nancy, France, July, p. 264-265. Also published on www.gemresearch.ch

Plato, W. (1952). Oriented Lines in Synthetic Corundum. Gems & Gemology, Vol. 7, No. 7, pp. 223-224.

Pough, F.H. (1958). Hydrothermal Ruby Crystals. The Gemmologist, Vol. 27, No. 327, pp. 179-184.

Pough, F.H. (1980). Rubies: Better Red Than Real. Jeweler's Circular-Keystone, February, pp. 188-192.

Read, P. (1983). The Kashan Identification Myth. Gem Instrument Digest, Vol. 1, No. 2 (August), pp. 15-17.

Saito, M. (1986). Growth Process of Gas Bubble in Ruby Single Crystals by Floating Zone Method. Journal of Crystal Growth, Vol. 74, Issue 2 (February-March), pp. 385-390. abstract

Scarratt, K. (1977). A Study of Recent Chatham Synthetic Ruby and Synthetic Blue Sapphire Crystals with a View to the Identification of Possible Faceted Material. The Journal of Gemmology, Vol. 15, No. 7, pp. 347-353.

Schmetzer, K. (1986). Production Techniques of Commercially Available Gem Rubies. The Australian Gemmologist, Vol. 16, No. 3, pp. 95-100.

Schmetzer, K. (1986). An Improved Sample Holder and Its Use in the Distinction of Natural and Synthetic Ruby as well as Natural and Synthetic Amethyst. The Journal of Gemmology, Vol. 20, No. 1, pp. 20-33.

Schmetzer, K. (1986). Natürliche und synthetische Rubine: Eigenschaften und Bestimmung. E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany, 131 p. ISBN 3-510-65125-1 (in German).

Schmetzer, K. (1987). On Twinning in Natural and Synthetic Flux-Grown Ruby. The Journal of Gemmology, Vol. 20, No. 5, pp. 294-305.

Schmetzer, K. (1987). Production Techniques of Commercially Available Knischka Synthetic Rubies—An Additional Note. The Australian Gemmologist, Vol. 16, No. 5, pp. 192-194.

Schmetzer, K. (1999). Im Hydrothermalverfahren hergestellte synthetische Rubine und Sapphire aus Russland. Goldschmiede Zeitung, Vol. 97, No. 9, pp. 103-109 (in German).

Schmetzer, K. & Bank, H. (1988). Lechleitner synthetic rubies with natural seed and synthetic overgrowth. The Journal of Gemmology, Vol. 21, No. 2, pp. 95-97.

Schmetzer, K. & Peretti, A. (1999). Some Diagnostic Features of Russian Hydrothermal Synthetic Rubies and Sapphires. Gems & Gemology, Vol. 35, No. 1 (Spring), pp. 17-28.

Schmetzer, K. & Schupp, F.-J. (1994). Flux-Induced Fingerprint Patterns in Synthetic Ruby: An Update. Gems & Gemology, Vol. 30, No. 1 (Spring), pp. 33-38.

Schmetzer, K. & Peretti, A. (2000). Characterization of a group of experimental Russian hydrothermal synthetic sapphires. The Journal of Gemmology, Vol. 27, No. 1, pp. 1-7.

Sechos, B. (1984). Kashan Synthetic Ruby. Wahroongai News, Vol. 18, No. 3 (March), pp. 10-13.

Shipley, R.M. (1934). Straight Striae in Synthetics. Gems & Gemology, Vol. 1, No. 2 (March-April), pp. 53-54.

Smirnov, S.Z., Bakumendo, I.T., Tomilenko, A.A. & Bukin, G.V. (1997). Inclusions of a mineral-forming medium as indicators of the origin of synthetic gemstones (exemplified by melt- and flux-grown crystals). Russian Geology and Geophysics, Vol. 38, No. 10, pp. 1669-1678.

Smith, C.P. (2002). "Diffusion Ruby" Proves to be Synthetic Ruby Overgrowth on Natural Corundum. Gems & Gemology, Vol. 38, No. 3 (Fall), pp. 240-248.

Snow, J., Sanders, J. & Brown, G. (1985). Nakazumi Synthetic Star Corundum. The Australian Gemmologist, Vol. 15, No. 11, pp. 410-412.

St. Clair, B.W. (1934). Sapphires and Sapphire Bearings. Gems & Gemology, Vol. 1, No. 6 (November-December), pp. 173-174.

Sunagawa, I. (1998). Imperfections and inhomogeneities in single crystals as a basis to distinguish natural from synthetic gemstones. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 47, No. 1, pp. 45-52 (in German).

Teshima, K., Kondo, H. & Oishi, S. (2005). Growth of hexagonal bipyramidal ruby crystals by the evaporation of molybdenum trioxide flux. The Journal of Gemmology, Vol. 29, No. 7/8, pp. 450-454. Also published in the Journal of the American Chemical Society (2004), Vol. 126, Issue 15, pp. 4768–4769. abstract

Thomas, V.G., Mashkovtsev, R.I., Smirnov, S.Z. & Maltsev, V.S. (1997). Tairus Hydrothermal Synthetic Sapphires Doped with Nickel and Chromium. Gems & Gemology, Vol. 33, No, 3 (Fall), pp. 188-202.

Timofeeva, V.A. & Voskanyan, R.A. (1963). Growth of Corundum Crystals from Solution in Molten Lead Fluoride. Translated into English from Kristallografiya, Vol. 8, No. 2, March-April, pp. 293-296.

Ueda, R. & Mullin, J.B. (Editors) (1975). Crystal Growth and Characterization. Proceedings of the ISSCG2 Springschool, Japan, 1974. North Holland Publishing Co., Amsterdam, Holland | American Elsevier Publishing Co., Inc., New York, USA, 419 p., ISBN 0-7204-0414-2 (North Holland) | ISBN 0-444-11061-5 (Elsevier).

Watanabe, K. & Sumiyoshi, Y. (1976). Relationship Between Habit and Etch Figures of Corundum Crystals Grown from Molten Cryolite Flux. Journal of Crystal Growth, Vol. 32, Issue 3 (March), pp. 316-326. abstract

Webster, R. (1970). Modern Synthetic Gemstones. The Journal of Gemmology, Vol. 12, No. 4, pp. 101-148.

Trapiche

Beaton, D. (2008). Lab Notes: A rare yellow trapiche sapphire. Gems & Gemology, Vol. 44, No. 3 (Fall), pp. 259-260.

Garnier, V., Ohnenstetter, D., Giuliani, G. & Schwarz, D. (2002). Rubis trapiches de Mong Hsu, Myanmar. Revue de Gemmologie, Association Française de Gemmologie, No. 144, pp. 5–12 (in French).

Garnier, V., Ohnenstetter, D., Giuliani, G., blanc, P. & Schwarz, D. (2002). Trace-element contents and cathodoluminescence of “trapiche” rubies from Mong Hsu, Myanmar (Burma): geological significance. Mineralogy & Petrology, Vol. 76, Issue 3-4, pp. 179-193. abstract

Henn, U. & Bank, H. (1996). Trapicheartige Korunde aus Myanmar. Gemmologie. Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 45, No. 1, pp. 23-24 (in German).

Johnson, M.L. & Koivula, J.I. (1998b). Gem News: Vietnamese 'Trapiche' rubies. Gems & Gemology, Vol. 34, No. 3 (Fall), p. 225.

Kitamura, M. & Yamada, H. (1987). Origin of sector trilling in cordierite in Daimonji hornfels, Kyoto, Japan. Contributions to Mineralogy and Petrology, Vol. 97, Issue 1 (September), pp. 1–6. abstract

Khotchanin, K., Thanasuthipitak, K. & Thanasuthipitak, T. (2009). The structure and chemical composition of trapiche blue sapphire from Southern Vietnam and Cambodia. Journal of the Gemmological Association of Hong Kong, Vol. 30, pp. 25–35. Journal of the Gemmological Association of Hong Kong

Kiefert, L. (2012). Gem News International: Unusual trapiche sapphire. Gems & Gemology, Vol. 49, No. 3 (Fall), p. 229.

Koivula, J.I., Kammerling, R.C. & Fritsch, E. (1994). Gem news: "Trapiche" purple-pink sapphire. Gems & Gemology, Vol. 30, No. 3 (Fall), p. 197.

Müllenmeister, H.-J. & Zang, J. (1995). Ein Trapiche-Rubin aus Myanmar (Burma). Lapis, Vol. 20, No. 12, p. 50 (in German).

Ohnenstetter, D., Garnier, V., Giuliani, G. & blanc, P. (2003). Trapiche texture in precious gemstones, Université Pierre et Marie Curie (presentation).

Peretti, A., Mullis, J. & Mouawad, F. (1996). The role of fluorine in the formation of colour-zoning in rubies from Mong Hsu, Myanmar (Burma). The Journal of Gemmology, Vol. 25, No. 1, pp. 3-19.

Peretti, A., Schmetzer, K., Bernhardt, H.-J. & Mouawad, F. (1995). Rubies from Mong-Hsu. Gems & Gemology, Vol. 31, No. 1 (Spring), pp. 2-26.

Petreus I. (1974). The divided structure of crystals, II. Secondary structures and habits. Neues Jahrbuch für Mineralogie, Abhandlungen, Vol. 122, No. 3, pp. 314-338.

Petreus, I. (1978). The divided structure of crystals I. Lineage and sectoral structure in pyrite and beryl. American Mineralogist, Vol. 63, pp. 725-731. American Mineralogist Tables of Contents

Schmetzer, K., Beili, Z., Yan, G., Bernhardt, H.-J. & Hänni, H.A. (1998). Element mapping of trapiche rubies. The Journal of Gemmology, Vol. 26, No. 5, pp. 289-301.

Schmetzer, K., Hänni, H.A., Bernhardt, H.-J. & Schwarz, D. (1996a). Trapiche rubies. Gems & Gemology, Vol. 32, No. 4 (Winter), pp. 242-250.

Schmetzer, K., Hänni, H.A., Bernhardt, H.-J. & Schwarz, D. (1997). Trapiche-Rubine. Deutsche Goldschmiede Zeitung, Vol. 95, pp. 107-112.

Sunagawa, I., Bernhardt, H.-J. & Schmetzer, K. (1999). Texture formation and element partitioning in trapiche ruby. Journal of Crystal Growth, Vol. 206, pp. 322-330. abstract

Wathanakul, P., Atichat, W., Pisutha-Arnond, V., Win, T.T. & Singbamroong, S. (2004). Evidence of the Unusually High Be, Sn, Nb, and Ta Content in Some Trapiche-like Sapphires from Basaltic Origins. Proceedings 29th IGC, Wuhan, China, pp. 114-118.

Win, K.K. (2005). Trapiche of Myanmar. The Australian Gemmologist, Vol. 22, No. 6 (April-June), pp. 269-270.

Treatments

Anonymous (2007). Identification of heated / unheated status on ruby and sapphire. Gemmology, Japan, Vol. 38, No. 449, pp. 24-27. excerpt from Gemmological Association of All Japan

Anonymous (2007). New blue treated sapphire. Gem & Jewelry Institute of Thailand Online Report on Gem & Jewelry Institute of Thailand

Anonymous (2008). Update on an uncommon lead-glass treated ruby. Gem & Jewelry Institute of Thailand Online Report on Gem & Jewelry Institute of Thailand

Anonymous (2011). Getting to know more about corundum enhancement. Russian Diamonds & Jewellery, No. 1, p. 10.

Anonymous (2012). Corundum: with glass filled fissures, with glass filled cavities, with/and glass (manufactured product). Laboratory Manual Harmonization Committee Information Sheet, No. 3, Version 9, last updated December 2012 on www.lmhc-gemology.org

Abraham, J.S.D. (1982). Heat Treating Corundum: The Bangkok Operation. Gems & Gemology, Vol. 18, No. 2 (Summer), pp. 79-82.

Ahmadjan, A. (2007). Treatment in Blue Sapphire "Super Diffusion Tanusorn" - filling treatment with cobalt-coloured lead glass was published as an GAAJ-Zenhokyo Online Report but appears to be no longer available.

Ashbaugh, III, C.E. (Not dated; Retrieved March 17th 2014). Radioactive and Radiation Treated Gemstones. Radioactivity and Radiochemistry, Vol. 2, No. 1, pp. 42-57.

Balmer, W.A. & Krzemnicki, M.S. (2015). Be-detection by FTIR on corundum: A preliminary report In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 69-71. The entire publication is available on www.igc-gemmology.net

Chatagnier, P.-Y., Fritsch, E., Rondeau, B., Karampelas, S. & Gaillou, E. (2011). Un surprenant triple corindon - verre au plomb. Revue de Gemmologie, Association Française de Gemmologie, No. 178, pp. 17-20 (in French).

Chuangfu, W., Yaoshan, Y. & Guoxun, L. (1992). Oxidation treatment of the sapphires from Shandong Province, China. The Journal of Gemmology, Vol. 23, No. 4, pp. 195-197.

Coldham, T.S. (2002). Orange sapphires or just lemons? The Australian Gemmologist, Third Quarter, Vol. 22, No. xx (xxx), pp. 288-293.

Coldham, T.S. (2003). The history and importance of heat treatment of Australian sapphire. The Australian Gemmologist, Third Quarter, Vol. 21, No. xx (xxx), pp. 450-462.

Coldham, T.S. (1986). Inclusions in Australian Sapphire Before and After Heat Treatment. The Australian Gemmologist, Vol. 16, No. 3, pp. 122-125.

Crowningshield, R.. & Nassau, K. (1981). The Heat and Diffusion Treatment of Natural and Synthetic Sapphires. The Journal of Gemmology, Vol. 17, No. 8, pp. 528-541.

Damigos, E. (1987). Déshydratation de la boehmite en alumine de transition. Étude thermodynamique et structurale. Doctoral dissertation. Ecole National Superieure des Mines de Saint-Etienne, Institut National Polytechnique de Grenoble, 106 p. (in French)

De Vincenti, C. (2012). Rubis et saphirs sont de plus en plus traites (1e partie). Gold'Or, No. 6, pp. 62-63 (in French).

De Vincenti, C. (2012). Rubis et saphirs sont de plus en plus traites (2e partie). Gold'Or, No. 7, pp. 68-69 (in French).

Dunaigre, C. (2000). Remplissage et cicatrisation des fissures dans les rubis. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Du Toit, G. (2009). Lab notes: Blue sapphires, diffusion treated with both titanium and beryllium. Gems & Gemology, Vol. 45, No. 4 (Winter), pp. 293-294.

Ediriweera, R.N. (1988). Scientific aspects of geuda beneficiation. Journal of the Gemmologists Association of Sri Lanka, No. 5, pp. 1-6.

Ediriweera, R.N. (1988). Scientific aspects of geuda beneficiation. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 40, No. 2/3, pp. 149-154.

Ediriweera, R.N. & Perera, S.I. (1989). Heat treatment of geuda stones – Spectral investigation. The Journal of Gemmology, Vol. 21, No. 7, pp. 403-404.

Ellawala, A.E.T. (1988). The commercial impact of the beneficiation of geuda. Journal of the Gemmologists Association of Sri Lanka, No. 5, pp. 31-35.

Emmett, J.L. (1999). Fluxes and the Heat Treatment of Ruby and Sapphire. Gems & Gemology, Vol. 35, No. 3 (Fall), pp. 90-92.

Emmett, J.L. & Douthit, T.R. (1993). Heat Treating the Sapphires of Rock Creek, Montana. Gems & Gemology, Vol. 29, No. 4 (Winter), pp. 250-272.

Emmett, J.L., Scarratt, K., McClure, S.F., Moses, T., Douthit, T.R., Hughes, R.W., Novak, S., Shigley, J.E., Wang, W., Bordelon, O. & Kane, R.E. (2003). Beryllium Diffusion of Ruby and Sapphire. Gems & Gemology, Vol. 39, No. 2 (Winter), pp. 84-135.

Grognot, J. (2004). Identification des saphirs bleus chauffés à haute température. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Gunaratne, H.S. (1981). "Geuda Sapphires"—Their Colouring Elements and Their Reaction to Heat. The Journal of Gemmology, Vol. 17, No. 5, pp. 292-300.

Gunawardene, M. (1984). Contribution Towards the Identification of Treated Corundums: Heat and Diffusion Treated Rubies. The Journal of Gemmology, Vol. 19, No. 4 (October), pp. 298-310.

Hainschwang, T. (2008). Lead-glass-treated blue sapphire. Gems & Jewellery, Vol. 17, No. 3, pp. 3-5. preview

Hänni, H.A. (1982). Zur Erkennung diffusionbehandelter Korunde. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 31, Nos. 1-2, pp. 49-57 (in German). Also published on www.ssef.ch

Hänni, H.A. (1986). Behandelte Korunde mit glasartigen Fallungen. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 35, Nos. 3-4, pp. 87-96 (in German). Also published on www.ssef.ch

Hänni, H.A. (2001). Beobachtungen an hitzebehandeltem Rubin mit künstlicher Rissheilung. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 50, No. 3, pp. 123-136 (in German). Also published on www.ssef.ch

Hänni, H.A. (2003). In Thailand behandelte orangefarbene Saphire. SSEF Facette, Nr. 10, pp xx-xx (in German).

Hänni, H.A. (2005). The breakthrough in orange: Easy detection of Be-diffusion treated corundum with Laser Induced Breakdown Spectroscopy (LIBS). SSEF Facette, No. 12, pp. xx-xx. Also published on www.ssef.ch

Hänni, H.A. & Pettke, T. (2005). A new diffusion treatment supplies orange and yellow sapphires. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 51, No. 4, pp. 137-152 (in German). Also published on www.ssef.ch

Harder, H. (1990). Klare und trübe Korunde als Rohsteine für wärmedbehandelte Saphire aus Sri Lanka. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 39, No. 1, pp. 73-87.

Henn, U. & Milisenda, C.C. (2005). Edelsteine und ihre künstlichen Eigenschaftsveränderungen. Deutsche Gemmologischen Gesellschaft, Idar-Oberstein, Germany, 84 p. ISBN 3-932515-46-3.

Hughes, R.W. (1984). Surface Repaired Rubies. The Australian Gemmologist, Vol. 15, No. 8 (November), pp. 279-280.

Hughes, R.W. (1987). Technique for detection of heat treatment in Sri Lankan yellow and orange sapphires. ICA Lab Alert, No. 1, 2 p.

Hughes, R.W. (1988). Identifying yellow sapphires—two important techniques. The Journal of Gemmology, Vol. 21, No. 1, pp. 23-25.

Hughes, R.W. (1988). Surface repaired corundum—two unusual variations. The Journal of Gemmology, Vol. 21, No. 1, pp. 8-10.

Hughes, R.W. (1995). A Brief History of Heat. The Australian Gemmologist, Vol. 19, No. 2 (xxxx), pp. 52-54.

Hughes, R.W. & Emmett, J.L. (2004). Fluxed Up: The Fracture Healing of Ruby on www.ruby-sapphire.com

Hughes, R.W. & Galibert, O. (1998). Foreign Affairs. The Australian Gemmologist, Vol. 20, No. 2, pp. 70–74. Also published on www.ruby-sapphire.com

Hughes, R.W. & Koivula, J.I. (2005). The synthetic healing of ruby. AGTA GTC’s Laboratory Update, November 30.

Johnson, M.L. & Koivula, J.I. (1998b). Gem News: Radioactive rubies. Gems & Gemology, Vol. 34, No. 3 (Fall), p. 227-228.

Kammerling, R.C., Koivula, J.I. & Kane, R.E. (1990). Gemstone Enhancement and Its Detection in the 1980s. Gems & Gemology, Vol. 26, No. 1 (Spring), pp. 32-49.

Kane, R.E. (1984). Natural Rubies with Glass-Filled Cavities. Gems & Gemology, Vol. 20, No. 4 (Winter), pp. 187-199.

Kane, R.E. (1985). A preliminary report on the new Lechleitner synthetic ruby and synthetic blue sapphire. Gems & Gemology, Vol. 21, No. 1 (Spring), pp. 35–39.

Kane, R.E., Kammerling, R.C., Koivula, J.I., Shigley, J.E. & Fritsch, E. (1990). The Identification of Blue Diffusion-Treated Sapphires. Gems & Gemology, Vol. 26, No. 2 (Summer), pp. 115-133.

Kane, R.E., Kammerling, R.C., Koivula, J.I., Shigley, J.E. & Fritsch, E. (1993). Identificacion de zafiros tratados por difusion. Boletin del Instituto Gemologico Espanol, No. 35 (Deciembre), pp. 7-23. (In Spanish).

Krzemnicki, M.S. (2010). How to get the "blues" out of the pink: detection of low-temperature heating of pink sapphires. SSEF Facette, No. 17, p. 12.

Koivula, J.I. (1983). Induced Fingerprints. Gems & Gemology, Vol. 19, No. 4 (Winter), pp. 220-227.

Koivula, J.I. (1986). Carbon Dioxide Fluid Inclusions as Proof of Natural-Colored Corundum. Gems & Gemology, Vol. 22, No. 3 (Fall), pp. 152-155.

Koivula, J.I. (1987). Internal Diffusion. The Journal of Gemmology, Vol. 20, Nos. 7/8, pp. 474-477.

Koivula, J.I. (2007). Lab Notes: Unusual dendrites in a heat-treated blue sapphire. Gems & Gemology, Vol. 43, No. 1 (Spring), pp. 54-55.

Kyi, U H., Buchholz, P. a Wolf, D. (1998). Heat treatment of milky sapphires from the Mogok stone tract, Myanmar. The Journal of Gemmology, Vol. 26, No. 5, pp. 313-315.

Leelawatanasuk, T. (2012). Urgent Lab Info: “Blue dyed and clarity modified sapphire with cobalt + lead-glass filler in fractures and cavities”. Gem & Jewelry Institute of Thailand Online Report on Gem & Jewelry Institute of Thailand

Leelawatanasuk, T., Atitchat, W., Pisutha-Arnond, V., Wattanakul, P., Papawarin Ounorn, P., Manorotkul, W. & Hughes, R.W. (2013). Cobalt-Doped Glass-Filled Sapphires: An Update. Australian Gemmologist, Vol. 25, No. 1, pp. 14–20, and on www.ruby-sapphire.com

Leelawatanasuk, T. & Maneekrajangsaeng, M. (2013). Urgent Lab Info: "Reconstructed sapphire: a new type of manmade gem corundum". Gem & Jewelry Institute of Thailand Online Report on Gem & Jewelry Institute of Thailand

Leelawatanasuk, T., Naruedeesombat, N., Susawee, N., Lomthong, P. & Wathanakul, P. (2015a). “Surface de-leaded” ruby In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 72-75. The entire publication is available on www.igc-gemmology.net

Leelawatanasuk, T., Susawee, N., Maneekrajangsaeng, M., Saengbuangarmlum, S., Promwongnan, S., Atsawatanapirom, N., Lomthong, P. & Wathanakul, P. (2015b). Treated black sapphire In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 158-161. The entire publication is available on www.igc-gemmology.net

Massi, L. (1999). Les corindons diffusés. Diplôme d'Université de Gemmologie (DUG) Dissertation, University of Nantes (in French).

Maxwell, M. (2002). The processing & heat treatment of Subera (Queensland) sapphire rough. The Australian Gemmologist, Last Quarter, 21, pp. 279-286.

McClure, S.F. & Koivula, J.I. (2001). A New Method for Imitating Asterism. Gems & Gemology, Vol. 37, No. 2 (Summer), pp. 124-128.

McClure, S.F. & Smith, C.P. (2000). Gemstone Enhancement and Detection in the 1990s. Gems & Gemology, Vol. 36, No. 4 (Winter), pp. 336-359.

McClure, S.F., Kammerling, R.C. & Fritsch, E. (1993). Update on Diffusion-Treated Corundum: Red and Other Colors. Gems & Gemology, Vol. 29, No. 1 (Spring), pp. 16-28.

McClure, S.F. (2005). Le traitement des corindons au beryllium: une mise au point. Revue de Gemmologie, Association Française de Gemmologie, No. 153 (Septembre), pp. 4-7 (in French).

Moon, A.R. & Phillips, M.R. (1986). Inclusions in Sapphire and Heat Treatment. The Australian Gemmologist, Vol. 16, No. xx, pp. 163-166.

Nassau, K. (1981). Heat Treating Ruby and Sapphire: Technical Aspects. Gems & Gemology, Vol. 17, No. 3 (Fall), pp. 121-131.

Nassau, K. (1984). The Early History of Gemstone Treatments. Gems & Gemology, Vol. 20, No. 1 (Spring), pp. 22-33.

Nassau, K. (1994). Gemstone Enhancement. History, Science, and State of the Art. 2nd Edition, Reprinted 1996. Butterworth-Heinemann, Oxford, U.K., 252 p. ISBN 0-7506-1797-7.

Okano, M. & Kitawaki, H. (2010). Sapphire in various colours filled with lead-glass. Gemmology, Japan, Vol. 41, No. 488-489, pp. 2-3.

Pardieu, V. (2005). Identification des corindons chauffés avec addition de verre au plomb. Revue de Gemmologie, Association Française de Gemmologie, No. 152 (Juin), pp. 20-22 (in French).

Pardieu, V. (2005). Lead glass filled/repaired rubies. Asian Institute of Gemological Sciences Gem Testing Laboratory Online Report on www.fieldgemology.org

Peretti, A. & Gunther, D. (2002). The Color Enhancement (E) of Fancy Sapphires with a New Heat Treatment Technique (Part A): Inducing Color Zoning by Internal (I) Migration (M) and Formation of Color Centers E(IM). Contributions to Gemology, No. 1, p. 1-48. Gemresearch Swisslabb, Lucerne, xx p. ISBN 974-90505-5-X.

Peretti, A., Günther, D. & Graber, A.-L. (2003). The Beryllium Treatment of Fancy Sapphires with a New Heat-treatment Technique (Part B). Contributions to Gemology, No. 2, p. 21-34. GemResearch Swisslab, Lucerne, 36 p. ISBN 978-3-9523359-3-2.

Pemadasa, T.G. & Danapala, M.V. (1994). Heat treated corundums of Sri Lanka: their heat treatment. The Australian Gemmologist, August, pp. 346-347.

Pisutha-Arnond, V., Häger, T., Atichat, W. & Wathanakul, P. (2006). The role of Be, Mg, Fe and Ti in causing colour in corundum. The Journal of Gemmology, Vol. 30, No. 3-4, pp. 131-143.

Pisutha-Arnond, V., Häger, T., Wathanakul, P. & Atichat, W. (2004). Yellow and brown coloration in beryllium-treated sapphires. The Journal of Gemmology, Vol. 29, No. 2, pp. 77-103.

Pisutha-Arnond, V., Rochd, C., Atichat, W., Wathanakul, P. & Narudeesombat, N. (2015). Role of Be in reduction and oxidation heating of sapphire In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 65-68. The entire publication is available on www.igc-gemmology.net

Promwongnan, S., Saengbuangarmlum, S. & Leelawatanasuk, T. (2015). Synthetic ruby overgrowth on natural corundum In: Proceedings: 34th International Gemmological Conference IGC, Vilnius, Lithuania, 26-30 August 2015, pp. 162-165. The entire publication is available on www.igc-gemmology.net

Rankin, A.H. & Edwards, W. (2003). Some effects of Extreme Heat Treatment on Zircon Inclusions in Corundum. The Journal of Gemmology, Vol. 28, No. 5, pp. 257-264.

Rockwell, K.M. & Breeding, C.M. (2004). Rubies, Clarity Enhanced with a Lead Glass Filler. Gems & Gemology, Vol. 28, No. 2 (Summer), pp. 112-115.

Ruzeng, Y., Yuan, Y. & Xu, H. (2005). Sapphire diffusion treatment and the behaviour of iron and titanium. The Journal of Gemmology, Vol. 29, No. 7/8, pp. 455-460.

Sandreyev, D.V., Arsenyev, P.A., Mareyeva, Z.G., Mayer, A.A., Tolchinsky, R.M. & Farschtendiker, V.L. (1973). Some Defects Appearing in Chromium Doped Al203 monocrystals as a Result of Thermal Treatment. Kristall und Technik, Vol. 8, No. 8, pp. 957-963.

Sasaki, E. (1980). Treatment of Sapphires. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 29, Nos. 1-2 (June), p. 66 (in German).

Scarratt, K. (1983). Heat Treated Sapphires. Retail Jeweler, Vol. 22, No. 543, pp. 16-26.

Scarratt, K. & Harding, R.R. (1984). Glass Infilling of Cavities in Natural Ruby. The Journal of Gemmology, Vol. 19, No. 4, pp. 293-297.

Scarratt, K. & Harding, R.R., Din, V. K. (1986). Glass Filling in Sapphire. The Journal of Gemmology, Vol. 20, No. 4, pp. 203-207.

Scarratt, K. (2012). A discussion on ruby-glass composites & their potential impact on the nomenclature in use for fracture-filled or clarity enhanced stones in general. Gemological Institute of America Online Report on www.giathai.net

Schiffmann, C.A. (1981). Unstable colour in a yellow sapphire from Sri Lanka. The Journal of Gemmology, Vol. 27, No. 8, pp. 615-618.

Schmetzer, K. (2006). Identificacion de padparadschas y zafiros amarillo a rojo tratados termicamente, por difusion y sin tratar. Gemas y Minerales, Vol. xx, pp. 22-34. (In Spanish).

Schmetzer, K. & Kiefert, L. (1990). Spectroscopic evidence for heat treatment of blue sapphires fro Sri Lanka – additional data. The Journal of Gemmology, Vol. 22, No. 2, pp. 80-82.

Schmetzer, K. & Schwarz, D. (2004). The causes of colour in untreated, heat treated and diffusion treated orange and pinkish-orange sapphires – a review. The Journal of Gemmology, Vol. 26-29, No. 3, pp. 149-182.

Schmetzer, K. & Schwarz, D. (2005). A microscopy-based screening system to identify natural and treated sapphires in the yellow to reddish-orange colour range. The Journal of Gemmology, Vol. 29, No. 7-8, pp. 407-449.

Schmetzer, K. & Schupp, F.-J. (1994). Dyed natural star corundum as a ruby imitation. The Journal of Gemmology, Vol. 24, No. 4 (October), pp. 253-255.

Schmetzer, K., Bosshart, G. & Hänni, H.A. (1983). Naturally-Coloured and Treated Yellow and Orange-Brown Sapphires. The Journal of Gemmology, Vol. 18, No. 7, July, pp. 607-622.

Schmetzer, K., Hänni, H.A., Jegge, E.P. & Schupp, F.-J. (1992). Dyed Natural Corundum as a Ruby Imitation. Gems & Gemology, Vol. 28, No. 2 (Summer), pp. 112-115.

Sechos, B. (1995). Visual Characteristics of Heat Treated Corundum. The Australian Gemmologist, Vol. 19, No. 2 (xxxxx), pp. 69-72.

Smith, C.P. & McClure, S.F. (2002). Chart of Commercially Available Gem Treatments. Gems & Gemology, Vol. 38, No. 4 (Winter), pp. 294-300.

Smith, C.P. (2002). Diffusion Ruby proves to be synthetic ruby overgrowth on natural corundum. Gems & Gemology, Vol. 38, No. 3 (Fall), pp. 240-248.

Smith, C.P. (2013). Cobalt-Colored Composite Sapphires Now Entering the Market. American Gemological Laboratories Press Release on www.aglgemlab.com

Sun, Z. & Breitzmann, H. (2014). Flame-fusion synthetic ruby boule with flux synthetic ruby overgrowth. Gems & Gemology, Vol. 50, No. 3 (Fall), pp. 242-243.

Themelis, T. (1992). The Heat Treatment of Ruby and Sapphire. 1st Ed., Gem Lab Inc., Clearwater, Florida, 236 p. ISBN 0-940965-10-0.

Themelis, T. (1995). Heat Treating Sapphires from the Anakie District, Australia. The Australian Gemmologist, Vol. 19, No. 2 (xxxx), pp. 55-60.

Themelis, T. (2003). Beryllium-treated Rubies and Sapphires. Private publication, Bangkok, 48 p. ISBN 0-940965-40-2.

Themelis, T. (2004). Flux-Enhanced Rubies & Sapphires. Private publication, Bangkok, 48 p. ISBN 0-940965-42-9.

Themelis, T. (2013). Cobalt-Infused Lead-Glass-Filled Sapphires on www.themelis.com

Tombs, G. (1978). Heat Treatment of Australian Blue Sapphires. The Australian Gemmologist, Vol. 13, No. 6, pp. 186-188.

Tombs, G. (1980). Further Thoughts and Questions on Australian Sapphires. Their Composition and Treatment. The Australian Gemmologist, Vol. 14, No. 4, pp. 64-68.

Tombs, G. (1980). Further Thoughts and Questions on Australian Sapphires, Their Composition and Treatment. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 29, Nos. 1-2 (June), pp. 79-81.

Tombs, G. (1982). Heat Treatment of Australian Blue Sapphires. Gemmologie: Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 31, Nos. 1-2 (June), pp. 41-48.

Wang, W. (2006). The effects of heat treatment on zircon inclusions in Madagascar sapphires. Gems & Gemology, Vol. 42, No. 2 (Summer), pp. 134-150.

Wijesuriya, G. (1985). The Technique of Heat Treating "Geuda" and Producing Blue Sapphires. The Journal of the Gemmologists Association of Sri Lanka, No. 2 (October), pp. 31-36.

Emmett, J.L., Hughes, R.W., Koivula, J.I. & Pardieu, V. (2006). Corundum Conundrums beryllium poisoning and other oddities, published on www.ruby-sapphire.com

Hughes, R.W. (2004). LIBS – A new beryllium testing method, published on www.palagems.com

Back to keyword section

Home

Back to top of page

Copyright © 2017 GemstoneBasics.com | All rights reserved | copyrights | terms of use | disclaimer | sitemap | contact