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


An overview of the Fall 2016 Gems & Gemology content.

Read More

Articles (6)

Color
Color

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.

Read More
Localities
Localities

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.

Read More
Localities
Localities

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.

Read More
Localities
Localities

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.

Read More
Cut
Cut

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.

Read More
View All Articles In This Issue

Regular Features

Lab notes
Lab Notes

The latest advances and findings from GIA laboratories.

View All (9)
Gem News
Gem News International

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

View All (12)
Micro-World

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

View All (9)
Book Review
Reviews

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

View All (8)

2016
G&G CHALLENGE WINNERS

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

Read more

You Might Also Like

Resources For Retailers
Resources For Retailers
learn more
Shop the Campus Store
Shop the Campus Store
Learn More
Exhibit: Variations on a Theme
Learn More
G&G Fall 2016 Edition
Learn more