An overview of the Summer 2022 Gems & Gemology content.

Rare optical phenomenon observed in four star quartz cabochons from Brazil.

GIA, the leader in gemological research, education and science-based gem identification and grading services, is expanding its gem origin services to provide retailers and consumers with the diamond source information they demand.

GIA welcomes Johanna Levy as the Institute’s first vice president of environmental, social and governance (ESG) programs.

GIA, the leader in gemological research, education and science-based gem identification and grading services, is expanding its gem origin services to provide retailers and consumers with the diamond source information they demand.

Characterizes yellow topaz from this historical source, with particular emphasis on its photo luminescence behavior.

After 15 years in the making, Jeffrey Bilgore’s stunning blue sapphire pendant makes its debut at the AGTA show.

At the AGTA show, we spoke with Natassa Patel, who along with her mother, Salma, owns and operates True Blue Opals and Gems.

Custom knife maker Loren Feldman details his craft, including his use of rare and fascinating materials such as gem dinosaur bone and meteorites.

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 finale of a two-part series on the mining history of Austrian emerald deposits in the Habachtal region.

A very light blue hexagonal apatite inclusion is observed in natural smoky quartz.

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.

Four-billion-year-old meteorite carved into a life-sized human skull draws attention at the 2022 AGTA show.

160 ct yellow sapphire rough from Sri Lanka.

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.

Sellers and buyers alike were delighted to be back at Tucson for the show season after a two-year absence.

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.

The first installment of this column explores the potential role of modern-day deep-focus earthquakes on diamond growth.