Large Diamond Inclusion in Diamond
A fascinating diamond crystal inclusion displaying a transparent, ghost-like appearance is identified in a Faint green diamond.
Natural Radioactivity in Select Serpentinite-Related Nephrite Samples: A Comparison with Dolomite-Related Nephrite
Uses gamma-ray spectrometry to directly measure internal radioactivity in green nephrite from deposits in Poland, Russia, Canada, and New Zealand.
Rare Orange Benitoite
The Carlsbad laboratory reports on a large and exceptionally rare example of bright orange benitoite.
GIA Alumni Collective
GIA’s new Alumni Collective connects graduates around the world to foster success in the gem and jewelry industry.
A Reported Cassis Pearl from Key West, Florida
A unique Cassis pearl discovered in the early 1960s is examined at the Carlsbad laboratory.
Three-Rayed Asterism in Quartz
Rare optical phenomenon observed in four star quartz cabochons from Brazil.
GIA 任命 Johanna Levy（约翰娜·利维）为环境、社会和治理项目副总裁
作为宝石学研究、教育以及以科学为基础的宝石鉴定与分级服务方面的领导者，GIA 目前正在积极拓展宝石原产地服务，致力于向零售商和消费者提供所需的钻石产地信息。
GIA 报告将于 2025 年实现数字化
作为宝石学研究、教育以及以科学为基础的宝石鉴定与分级服务方面的领导者，GIA 目前正在积极拓展宝石原产地服务，致力于向零售商和消费者提供所需的钻石产地信息。
Tucson 2022 Overview
Sellers and buyers alike were delighted to be back at Tucson for the show season after a two-year absence.
Washington Jade Update
At the AGTA show, Rod and Nathaniel Cook of Washington Jade (Edmonds, Washington) told us about shifting their focus to cat’s-eye blue and bluish green nephrite jade.
History of Emerald Mining in the Habachtal Deposit of Austria, Part II
The finale of a two-part series on the mining history of Austrian emerald deposits in the Habachtal region.
Gem Topaz from the Schneckenstein Crag, Saxony, Germany: Mineralogical Characterization and Luminescence
Characterizes yellow topaz from this historical source, with particular emphasis on its photo luminescence behavior.
Blue Sapphire Lord of the Rings Pendant
After 15 years in the making, Jeffrey Bilgore’s stunning blue sapphire pendant makes its debut at the AGTA show.
Conversation with True Blue Opals and Gems
At the AGTA show, we spoke with Natassa Patel, who along with her mother, Salma, owns and operates True Blue Opals and Gems.
Custom Knives by Loren Feldman
Custom knife maker Loren Feldman details his craft, including his use of rare and fascinating materials such as gem dinosaur bone and meteorites.
Fifth Annual Gianmaria Buccellati Foundation Award Winner
Meghan Simmons, a graduate of GIA’s Jewelry Design program at the Carlsbad campus, received the fifth annual Gianmaria Buccellati Foundation Award for Excellence in Jewelry Design.
Deep-Focus Earthquakes: The Heartbeat of a Diamond Factory?
The first installment of this column explores the potential role of modern-day deep-focus earthquakes on diamond growth.
Yellow Topaz from Germany, Emerald Mining in Austria’s Habachtal Region, a Return to Tucson, and More…
An overview of the Spring 2022 Gems & Gemology content.
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