Complex Fluid Inclusion in Topaz
A blue topaz recently examined by the authors contained an interesting and complex fluid-filled negative crystal that revealed some remarkable behavior when cooled down.
New Record Size for CVD Laboratory-Grown Diamond
The New York laboratory reports on a new record size for CVD laboratory-grown diamond.
YAG with Flux-Filled Fingerprints
The author recently examined a 3.58 ct yellowish green yttrium aluminum garnet, a manufactured product known in the trade as “YAG,” that contained numerous large flux-filled fractures.
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.
Tucson 2022 Overview
Sellers and buyers alike were delighted to be back at Tucson for the show season after a two-year absence.
Skull Carved of Meteorite
Four-billion-year-old meteorite carved into a life-sized human skull draws attention at the 2022 AGTA show.
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.
Stephen M. Avery: Celebrating Half a Century in Gem Cutting
Approaching his 50th anniversary in the business, Stephen M. Avery (Lakewood, Colorado) reflected on his journey to becoming an award-winning lapidary artist, detailing his signature cuts and gem sets and offering advice to up-and-coming gemstone cutters.
Blue Sapphire Lord of the Rings Pendant
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.
The Type IIb De Beers Cullinan Blue Diamond
GIA’s New York laboratory reports on a 15.10 ct (17.47 × 11.53 × 7.94 mm) Fancy Vivid blue cut-cornered rectangular step cut named the De Beers Cullinan Blue diamond.
GIA 通过 GIA Source Verify™ 拓展宝石原产地服务
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 在第五届年度大赛上表彰设计新秀
加利福尼亚州卡尔斯巴德— 2 月 14 日（星期一）— 2 月 4 日，来自 GIA 卡尔斯巴德校区的 GIA 毕业生 Meghan Simmons（梅根·西蒙斯）荣获第五届 Gianmaria Buccellati Foundation Award for Excellence in Jewelry Design（吉安马里亚·布契拉提基金会珠宝设计卓越奖）。
.jpg "YMAL GIA Ed")
