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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Akoya Cultured Pearl Farming in Eastern Australia
Laura M. Otter, Oluwatoosin B. A. Agbaje, Le Thi-Thu Huong, Tobias Häger, and Dorrit E. Jacob, January 26, 2018
Characterises the akoya cultured pearls produced on the eastern shoreline of Australia using native Pinctada imbricata fucata molluscs.
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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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A New Find of Danburite in the Luc Yen Mining Area, Vietnam
Le Thi-Thu Huong, Laura M. Otter, Tobias Häger, Tim Ullmann, Wolfgang Hofmeister, Ulrike Weis, and Klaus Peter Jochum, January 27, 2017
Reports on a recently discovered eluvial deposit of honey yellow danburite with excellent transparency.
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A New Deposit of Gem-Quality Grandidierite in Madagascar
Delphine Bruyère, Claude Delor, Julien Raoul, Rufin Rakotondranaivo, Guillaume Wille, Nicolas Maubec, and Abdeltif Lahfid, November 7, 2016
Reviews the properties of exceptionally pure grandidierite from a new source.
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Mining Diamonds in the Canadian Arctic: The Diavik Mine
James E. Shigley, Russell Shor, Pedro Padua, Christopher M. Breeding, Steven B. Shirey, and Douglas Ashbury, August 3, 2016
Located near the Arctic Circle, Diavik is one of the world’s richest diamond deposits and a leader in sustainable mining.
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Chrysoberyl from the New England Placer Deposits, New South Wales, Australia
Karl Schmetzer, Franca Caucia, H. Albert Gilg, and Terrence S. Coldham, April 28, 2016
Examines a collection of chrysoberyl samples from these sapphire placer deposits to determine their distinct mineralogical and chemical properties.
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Variscite from Central Tajikistan: Preliminary Results
Andrey K. Litvinenko, Elena S. Sorokina, Stefanos Karampelas, Nikolay N. Krivoschekov, and Roman Serov, April 28, 2016
A look at the gemmological properties and chemical composition of this light blue to light green to green gem material, which is suitable for cabochon cutting.
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Letšeng’s Unique Diamond Proposition
Russell Shor, November 22, 2015
Explores the history, geology and current production of this unique source of large diamonds.
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