https://www.lotusgemology.com/resources/4-treasures-reference-database/16573
On Color | Four Treasures Reference Database
Kastan, D.S. and Farthing, S. 2018. On Color. Four Treasures Reference Database, Lotus Gemology.
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Ancient Egyptian Materials and Industries | Four Treasures Reference Database
Lucas, A. and Harris, J.R. 1962. Ancient Egyptian Materials and Industries. Four Treasures Reference Database, Lotus Gemology.
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Gemmological characteristic of hot pink spinel from Man Sin, Myanmar | Four Treasures Reference...
Zhao, L., Li, G., Chai, M. and Liu, Y. 2019. Gemmological characteristic of hot pink spinel from Man Sin, Myanmar. Four Treasures Reference Database, Lotus...
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Die antiken Gemmen des Kunsthistorischen Museums in Wien | Four Treasures Reference Database
Zwierlein-Diehl, E. and Luckert, I. 1973, 1979, 1991. Die antiken Gemmen des Kunsthistorischen Museums in Wien. Four Treasures Reference Database, Lotus...
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The Art of Featherwork in Mexico | Four Treasures Reference Database
Castello Yturbide, T. 1993. The Art of Featherwork in Mexico. Four Treasures Reference Database, Lotus Gemology.
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A review of the history, geology and age of Burmese amber (burmite) | Four Treasures Reference...
Zherikhin, V.V. and Ross, A.J. 2000. A review of the history, geology and age of Burmese amber (burmite). Four Treasures Reference Database, Lotus Gemology.
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Splendid decorative art objects of Mughal India | Four Treasures Reference Database
Pathak, A. 2021. Splendid decorative art objects of Mughal India. Four Treasures Reference Database, Lotus Gemology.
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Reading the riddle of ancient jewels | Four Treasures Reference Database
Caso, A. 1932. Reading the riddle of ancient jewels. Four Treasures Reference Database, Lotus Gemology.
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L’émeraude minée: Chrétien de Troyes et le lapidaire | Four Treasures Reference Database
Ernstpeter, R. 2003. L’émeraude minée: Chrétien de Troyes et le lapidaire. Four Treasures Reference Database, Lotus Gemology.
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https://www.lotusgemology.com/resources/4-treasures-reference-database/16998
Geodesy, geology and mineralogy | geography and cartography | Four Treasures Reference Database
Ahmad, S.M. 2000. Geodesy, geology and mineralogy | geography and cartography. Four Treasures Reference Database, Lotus Gemology.
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Colour and Meaning | Art, Science and Symbolism | Four Treasures Reference Database
Gage, J. 1999. Colour and Meaning | Art, Science and Symbolism. Four Treasures Reference Database, Lotus Gemology.
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Datation-Caractérisation des peintures pariétales et murales | Four Treasures Reference Database
Delamare, F., Hackens, T. and Helly, B. 1987. Datation-Caractérisation des peintures pariétales et murales. Four Treasures Reference Database, Lotus Gemology.
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Die Chromitlagerstätten Sarany im Ural | Four Treasures Reference Database
Burlakov, E.V. and Avdonin, V.V. 2006. Die Chromitlagerstätten Sarany im Ural. Four Treasures Reference Database, Lotus Gemology.
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The use of the microscope in the study of ancient beads | Four Treasures Reference Database
Beck, H.C. 1934. The use of the microscope in the study of ancient beads. Four Treasures Reference Database, Lotus Gemology.
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Über Timur's (Tamerlan's) Grabstein aus Nephrit | Four Treasures Reference Database
Fischer, H. 1879. Über Timur's (Tamerlan's) Grabstein aus Nephrit. Four Treasures Reference Database, Lotus Gemology.
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Geoff Hinton, AI's most famous researcher, warns of ‘existential threat’ from AI | Four Treasures...
Smith, C.S. 2023. Geoff Hinton, AI's most famous researcher, warns of ‘existential threat’ from AI. Four Treasures Reference Database, Lotus Gemology.
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Orange-yellow inclusion in spinel from Man Sin, Myanmar | Four Treasures Reference Database
Zhai, S., Pei, J. and Huang, W. 2019. Orange-yellow inclusion in spinel from Man Sin, Myanmar. Four Treasures Reference Database, Lotus Gemology.
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Intailles de Lons-le-Saunier. Jura | Four Treasures Reference Database
Guiraud, H. 1995. Intailles de Lons-le-Saunier. Jura. Four Treasures Reference Database, Lotus Gemology.
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Venus und Virginitas – Zur Symbolik des Smaragds und seinen virtutes | Four Treasures Reference...
Schreiner, K. 1967. Venus und Virginitas – Zur Symbolik des Smaragds und seinen virtutes. Four Treasures Reference Database, Lotus Gemology.
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Amazonita en la máscara de Malinaltepec, Guerrero | Four Treasures Reference Database
Sánchez-Hernández, R. and Robles-Camacho, J. 2002. Amazonita en la máscara de Malinaltepec, Guerrero. Four Treasures Reference Database, Lotus Gemology.
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The topaz mines of Ouro Preto | Four Treasures Reference Database
Bastos, F.M. 1964. The topaz mines of Ouro Preto. Four Treasures Reference Database, Lotus Gemology.
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Jewelry and goldsmithing in medieval Islam: The religious point of view | Four Treasures Reference...
Ghabin, A. 1991. Jewelry and goldsmithing in medieval Islam: The religious point of view. Four Treasures Reference Database, Lotus Gemology.
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Mining in Central Asia in the XVI–XIX centuries | Four Treasures Reference Database
Bubnova, M.A. 1975. Mining in Central Asia in the XVI–XIX centuries. Four Treasures Reference Database, Lotus Gemology.
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Diamond Deposits: Origin, Exploration, and History of Discovery | Four Treasures Reference Database
Erlich, E.I. and Hausel, W.D. 2002. Diamond Deposits: Origin, Exploration, and History of Discovery. Four Treasures Reference Database, Lotus Gemology.
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Color and contingency in Robert Boyle’s Works | Four Treasures Reference Database
Baker, T. 2015. Color and contingency in Robert Boyle’s Works. Four Treasures Reference Database, Lotus Gemology.
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Gem News: “Golden” tourmaline from Kenya | Four Treasures Reference Database
Johnson, M.L. and Koivula, J.I. 1996. Gem News: “Golden” tourmaline from Kenya. Four Treasures Reference Database, Lotus Gemology.
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A new type of reconstituted jadeite product | Four Treasures Reference Database
Zhang, X., Chen, S., Tang, J. and Yang, Y. 2003. A new type of reconstituted jadeite product. Four Treasures Reference Database, Lotus Gemology.
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Jade and Jade Production in Precolumbian Mesoamerica | Four Treasures Reference Database
Clark, B.T. 2006. Jade and Jade Production in Precolumbian Mesoamerica. Four Treasures Reference Database, Lotus Gemology.
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Ancient naval technology and the route to India | Four Treasures Reference Database
Casson, L. 1991. Ancient naval technology and the route to India. Four Treasures Reference Database, Lotus Gemology.
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Colonel Thomas Blood: Crown Stealer—1618–1680 | Four Treasures Reference Database
Abbott, W.C. 1910. Colonel Thomas Blood: Crown Stealer—1618–1680. Four Treasures Reference Database, Lotus Gemology.
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Godfather of AI: They Keep Silencing Me But I’m Trying to Warn Them! | Four Treasures Reference...
Bartlett, S. 2025. Godfather of AI: They Keep Silencing Me But I’m Trying to Warn Them!. Four Treasures Reference Database, Lotus Gemology.
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Smaragdgruben von Muzo | Four Treasures Reference Database
Bergt, W. 1899. Smaragdgruben von Muzo. Four Treasures Reference Database, Lotus Gemology.
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G&G Micro-World: Vesuvianite in sapphire | Four Treasures Reference Database
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Careless People | A Cautionary Tale of Power, Greed, and Lost Idealism | Four Treasures Reference...
Wynn-Williams, S. 2025. Careless People | A Cautionary Tale of Power, Greed, and Lost Idealism. Four Treasures Reference Database, Lotus Gemology.
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Deliciae Cobresianiae: Büchersammlung zur Naturgeschichte | Four Treasures Reference Database
Cobres, J.P. 1782. Deliciae Cobresianiae: Büchersammlung zur Naturgeschichte. Four Treasures Reference Database, Lotus Gemology.
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Four Treasures of the Sky – Winchester Public Library
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The Poems of Sextus Propertius | Four Treasures Reference Database
Propertius, S. and McCulloch, J.P. 1972. The Poems of Sextus Propertius. Four Treasures Reference Database, Lotus Gemology.
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A Jewish intaglio from Roman Ammaia, Lusitania | Four Treasures Reference Database
Cravinho, G. and Amorai-Stark, S. 2006. A Jewish intaglio from Roman Ammaia, Lusitania. Four Treasures Reference Database, Lotus Gemology.
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A Field Guide to Australian Opals | Four Treasures Reference Database
O'Leary, B. 1977. A Field Guide to Australian Opals. Four Treasures Reference Database, Lotus Gemology.
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The Red Land: The Illustrated Archaeology of Egypt's Eastern Desert | Four Treasures Reference...
Sidebotham, S.E., Hense, M. and Nouwens, H.M. 2008. The Red Land: The Illustrated Archaeology of Egypt's Eastern Desert. Four Treasures Reference Database,...
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Gem minerals from the Saranovskoye chromite deposit, western Urals | Four Treasures Reference...
Spiridonov, E.M., Alferova, M.S. and Fattykhov, T.G. 1998. Gem minerals from the Saranovskoye chromite deposit, western Urals. Four Treasures Reference...
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Color Perception: Physiology, Processes and Analysis | Four Treasures Reference Database
Skusevich, D. and Matikas, P. 2010. Color Perception: Physiology, Processes and Analysis. Four Treasures Reference Database, Lotus Gemology.
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A Compilation of Knowledge for Understanding Precious Stones (Mineralogy) | Four Treasures...
Steblin-Kamensky, I.M. and Nikonorov, V.P. 2011. A Compilation of Knowledge for Understanding Precious Stones (Mineralogy). Four Treasures Reference Database,...
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The Value of Colours • Wild About Gems | Four Treasures Reference Database
Wild, C. 2011. The Value of Colours • Wild About Gems. Four Treasures Reference Database, Lotus Gemology.
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Remarks on a gem of the Laocoon | Four Treasures Reference Database
Smirke, E. 1868. Remarks on a gem of the Laocoon. Four Treasures Reference Database, Lotus Gemology.
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Medieval American Art | Four Treasures Reference Database
Kelemen, P. 1943. Medieval American Art. Four Treasures Reference Database, Lotus Gemology.
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On the trail of La Venta Man | Four Treasures Reference Database
Stirling, M.W. 1947. On the trail of La Venta Man. Four Treasures Reference Database, Lotus Gemology.
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Precious stones: Their examination and care in the museum setting | Four Treasures Reference...
Hutchinson, M. 1987. Precious stones: Their examination and care in the museum setting. Four Treasures Reference Database, Lotus Gemology.
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African Archaeology | Four Treasures Reference Database
Phillipson, D.W. 1993. African Archaeology. Four Treasures Reference Database, Lotus Gemology.
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1493: Uncovering the New World Columbus Created | Four Treasures Reference Database
Mann, C.C. 2011. 1493: Uncovering the New World Columbus Created. Four Treasures Reference Database, Lotus Gemology.
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Ancient Engraved Gems in the National Museum in Krakow | Four Treasures Reference Database
Gołyźniak, P. 2017. Ancient Engraved Gems in the National Museum in Krakow. Four Treasures Reference Database, Lotus Gemology.
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The Lapidary Industry of Teotihuacan, Mexico | Four Treasures Reference Database
Turner, M.H. 1988. The Lapidary Industry of Teotihuacan, Mexico. Four Treasures Reference Database, Lotus Gemology.
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Classic garnets – Pyrope | Four Treasures Reference Database
Zang, J. 2008. Classic garnets – Pyrope. Four Treasures Reference Database, Lotus Gemology.
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Sagesses Minérales: Médecine et Magie des Pierres Précieuses au Moyen Âge | Four Treasures...
Gontero-Lauze, V. 2010. Sagesses Minérales: Médecine et Magie des Pierres Précieuses au Moyen Âge. Four Treasures Reference Database, Lotus Gemology.
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Apuntes sobre un Jade y dos Colgantes de Esteatita del Norte de Costa Rica | Four Treasures...
Stone, D. 1963. Apuntes sobre un Jade y dos Colgantes de Esteatita del Norte de Costa Rica. Four Treasures Reference Database, Lotus Gemology.
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Jewels with cameos and intaglios the Castellani and Roman gem carvers | Four Treasures Reference...
Stefanelli, L.P.B. 2004. Jewels with cameos and intaglios the Castellani and Roman gem carvers. Four Treasures Reference Database, Lotus Gemology.
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The Hunterston Brooch and its significance | Four Treasures Reference Database
Stevenson, R.B.K. 1974. The Hunterston Brooch and its significance. Four Treasures Reference Database, Lotus Gemology.
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La Venta: Colossal Heads and Jaguar Gods | Four Treasures Reference Database
Covarrubias, M. 1946. La Venta: Colossal Heads and Jaguar Gods. Four Treasures Reference Database, Lotus Gemology.
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Catalogue of the Tiffany & Company Collection of Jade and Rock Crystal | Four Treasures Reference...
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Heat Treatment of Gemstones | Four Treasures Reference Database
Waitz, R. n.d. Heat Treatment of Gemstones. Four Treasures Reference Database, Lotus Gemology.
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Lapidary formulas as topics of invention: From Thomas of Hales to Henryson | Four Treasures...
Bishop, I. 1986. Lapidary formulas as topics of invention: From Thomas of Hales to Henryson. Four Treasures Reference Database, Lotus Gemology.
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Art in the Hellenistic Age | Four Treasures Reference Database
Pollitt, J.J. 1986. Art in the Hellenistic Age. Four Treasures Reference Database, Lotus Gemology.
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Age determination of zircon inclusion in Kashmir sapphire with U-Pb dating | Four Treasures...
Wu, W.X., Link, K., Liu, C.Z. and Kiefert, L. 2020. Age determination of zircon inclusion in Kashmir sapphire with U-Pb dating. Four Treasures Reference...
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Oxygen isotopes and emerald trade routes since antiquity | Four Treasures Reference Database
Giuliani, G., Chaussidon, M., Schubnel, H.-J., Piat, D.H., Rollion-Bard, C., France-Lanord, C., Giard, D., Narvaez, D.d. and Rondeau, B. 2000. Oxygen isotopes...
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Les rubis d’Ishtar: Étude en laboratoire | Four Treasures Reference Database
Calligaro, T., Bouquillon, A., Querré, G. and Poirot, J.-P. 1999. Les rubis d’Ishtar: Étude en laboratoire. Four Treasures Reference Database, Lotus Gemology.
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Infrared spectra and inclusions of emeralds from Pakistan | Four Treasures Reference Database
Guo, H. and Yu, X. 2019. Infrared spectra and inclusions of emeralds from Pakistan. Four Treasures Reference Database, Lotus Gemology.
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Explaining Graphs and Analyzing Characters | Four Treasures Reference Database
Xu, S. 121 CE; Eastern Han. Explaining Graphs and Analyzing Characters. Four Treasures Reference Database, Lotus Gemology.
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