Winter 2020 - Volume 56, Issue 4

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Editorial

Pink Sapphires from Madagascar, Rose-Cut Colored Stones from the Baroque Era, Separating Blue Amber Localities, and More…

Duncan Pay, Editor-in-Chief

An overview of the Winter 2020 Gems & Gemology content.
 

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Articles (4)

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Regular Features

Lab notes

Lab Notes

The latest advances and findings from GIA laboratories.

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Micro-World

An in-depth look at the hidden world of gem inclusions.

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Diamonds From the Deep

Explores the role of diamonds in our understanding of the natural world.

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Gem News

Gem News International

Global coverage of gem sources, notable new gem materials, and recent industry developments.

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THE DR. EDWARD J. GÜBELIN

MOST VALUABLE ARTICLE AWARD

Geographic Origin Determination of Blue Sapphire
Aaron Palke, Sudarat Saeseaw, Nathan Renfro, Ziyin Sun, and Shane McClure

Decade of Ruby from Mozambique: A Review
Wim Vertriest and Sudarat Saeseaw

Gemstones in the Era of the Taj Mahal and the Mughals
Dona Mary Dirlam, Chris L. Rogers, and Robert Weldon