the quarterly journal of the gemological institute of america
In This Issue
A Quantitative Description of the Causes of Color in Corundum
The Evolution of Chinese Jade Carving Craftsmanship
Color Characteristics of Blue to Yellow Beryl from Multiple Origins
History of the Chivor Emerald Mine, Part I (1880–1925): From Rediscovery to Early Production
Rhodonite-Pyroxmangite from Tanatz Alp, Switzerland
Previous Issue
the quarterly journal of the gemological institute of america
Dive Into Spring: Investigations into Corundum and Beryl Color, Jade Artistry, the Chivor Emerald Mine’s History, and Swiss Rhodonite…
Duncan Pay, Editor-in-Chief
Articles (5)
A Quantitative Description of the Causes of Color in Corundum
Presents a quantitative means of determining the causes of color in a gem material, using corundum’s six major chromophores as an illustration.
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The Evolution of Chinese Jade Carving Craftsmanship
Explores the art form of jade carving in China across five periods from the late Neolithic Age to the present day.
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Color Characteristics of Blue to Yellow Beryl from Multiple Origins
Discusses the features of alkali elements and their influence on the color of blue to yellow beryl.
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History of the Chivor Emerald Mine, Part I (1880–1925): From Rediscovery to Early Production
Chronicles developments at the Chivor emerald mine in Colombia between 1880 and 1925, based on archival records.
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Rhodonite-Pyroxmangite from Tanatz Alp, Switzerland
Investigates the chemical, physical, and gemological properties of attractive rhodonite-rich rocks from this Swiss deposit.
Read MoreRegular Features
Diamonds From the Deep
Explores the role of diamonds in our understanding of the natural world.
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Gem News International
Global coverage of gem sources, notable new gem materials, and recent industry developments.
View All (27)MOST VALUABLE ARTICLE AWARD
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Gemstones in the Era of the Taj Mahal and the Mughals
Dona Mary Dirlam, Chris L. Rogers, and Robert Weldon
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