Natural pearl identification is one of the critical problems in pearl research. The DNA study of pearly molluscs and oysters facilitates the solving of this problem. To fulfil this goal, GIA sent a group from both Research and Education to Tennessee to sample the freshwater molluscs for DNA bar-coding. Come with us to Camden, Tennessee, to see how we dive for pearly shells.
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G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.
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An overview of recently expanded sapphire production at the Gem Mountain mine near Philipsburg, Montana.
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G&G Brief presents an overview of the content of the Spring 2015 issue of Gems & Gemology.
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Natural gemstones are typically far more valuable than synthetic ones, so being able to identify them correctly is a powerful skill.
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Review of Richard Hughes’s Ruby & Sapphire: A Collector’s Guide.
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This study provides detailed mining and gemmological information on the Jegdalek deposit, in east-central Afghanistan, which is hosted by elongate beds of corundum-bearing marble.
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Gem-quality blue to bluish green sapphires from basaltic terrains in southern provinces of Vietnam have been entering the gemstone market since the late 1980s.
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Yogo Gulch, discovered more than 100 years ago, is one of four major sapphire-producing areas in Montana, United States.
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Gem-quality rubies and pink to purple sapphires are being recovered from the Luc Yen and Quy Chau mining regions of Vietnam.
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