Charting the Increasing Availability and Quality of CVD Synthetic Diamonds
Duncan Pay, Editor-in-Chief

An overview of the Fall 2016 Gems & Gemology content.

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Articles (6)


Peridot from the Central Highlands of Vietnam: Properties, Origin, and Formation

Nguyen Thi Minh Thuyet, Christoph Hauzenberger, Nguyen Ngoc Khoi, Cong Thi Diep, Chu Van Lam, Nguyen Thi Minh, Nguyen Hoang, and Tobias Häger, Nov 7, 2016

Analyzes the gemological and geochemical characteristics of peridot from the Gia Lai province alongside specimens from other localities to gain insight into its formation.

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Bead-Cultured and Non-Bead-Cultured Pearls from Lombok, Indonesia

Nicholas Sturman, Jeffery Bergman, Julie Poli, Artitaya Homkrajae, Areeya Manustrong, and Nanthaporn Somsa-ard, Nov 7, 2016

Documents the retrieval and testing of P. maxima cultured pearls from a Lombok hatchery.

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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, Nov 7, 2016

Reviews the properties of exceptionally pure grandidierite from a new source.

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Sapphires from the Sutara Placer in the Russian Far East

Svetlana Yuryevna Buravleva, Sergey Zakharovich Smirnov, Vera Alekseevna Pakhomova, and Dmitrii Gennadyevich Fedoseev, Nov 7, 2016

Studies the formation and chemical composition of the largely unexamined alluvial sapphires from Russia’s Jewish Autonomous District.

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Reversible Color Modification of Blue Zircon by Long-Wave Ultraviolet Radiation

Nathan D. Renfro, Nov 7, 2016

Determines whether blue zircon, inadvertently altered to brown by exposure to long-wave UV radiation, can be restored to its original color through the use of incandescent light.

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Regular Features

Lab notes
Lab Notes

The latest advances and findings from GIA laboratories.

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

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Book Review

Your guide to the latest
gem and jewelry books
and other media.

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Congratulations to the readers who earned a perfect score on this year's Challenge quiz.

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