An Early Byzantine Engraved Almandine from the Garibpet Deposit, Telangana State, India: Evidence for Garnet Trade Along the Ancient Maritime Silk Road
H. Albert Gilg, Karl Schmetzer, and Ulrich Schüssler, August 6, 2018
Analyses the chemical composition and inclusion characteristics of this ancient artefact.
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Gemmological Characterisation of Sapphires from Yogo Gulch, Montana
Nathan D. Renfro, Aaron C. Palke, and Richard B. Berg, August 6, 2018
A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.
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Gem Virtuosos: The Drehers and Their Extraordinary Carvings
Robert Weldon, Cathleen Jonathan, and Rose Tozer, January 26, 2018
A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.
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Observations on HPHT-Grown Synthetic Diamonds: A Review
Sally Eaton-Magaña, James E. Shigley, and Christopher M. Breeding, November 8, 2017
Summarises statistical data and distinctive features of several thousand gem-quality HPHT synthetic diamonds examined by GIA from 2007 through 2016.
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Synthetic Star Sapphires and Rubies Produced by Wiede’s Carbidwerk, Freyung, Germany
Karl Schmetzer, H. Albert Gilg, and Heinz-Jürgen Bernhardt, November 8, 2017
Details the process used by Wiede’s Carbidwerk to produce star synthetic corundum from the mid-1950s until the 1970s.
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Japanese Jadeite: History, Characteristics and Comparison with Other Sources
Ahmadjan Abduriyim, Kazuko Saruwatari, and Yusuke Katsurada, May 5, 2017
Examines the sources, colour, texture and chemical composition of jadeite from Japanese deposits.
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Jaipur, India: The Global Gem and Jewellery Power of the Pink City
Andrew Lucas, Nirupa Bhatt, Manoj Singhania, Kashish Sachdeva, Tao Hsu, and Pedro Padua, January 26, 2017
Examines Jaipur’s role as a coloured stone cutting and jewellery manufacturing centre, with profiles of 17 companies and their factory, trading and retail operations.
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Fabergé Cossack Figures Created from Russian Gemstones
Timothy Adams and Christel Ludewig McCanless, August 3, 2016
Hardstone figures of two Russian imperial bodyguards, commissioned in 1912 by Nicholas II, demonstrate the House of Fabergé’s meticulous detail and craftsmanship.
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Rough Diamond Auctions: Sweeping Changes In Pricing and Distribution
Russell Shor, January 30, 2015
Examines the growing percentage of rough diamonds being sold through auctions, a shift that has caused price volatility while opening up supply to more manufacturers and dealers.
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A Preliminary Study on the Separation of Natural and Synthetic Emeralds Using Vibrational Spectroscopy
Le Thi-Thu Huong, Wolfgang Hofmeister, Tobias Häger, Stefanos Karampelas, and Nguyen Duc-Trung Kien, January 30, 2015
Reports preliminary findings—based on FTIR and Raman spectrometry of more than 300 samples—on distinguishing natural and synthetic emeralds using vibrational spectroscopy.
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