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

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

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

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

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

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

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 author acquired an alluvial rough diamond from Guyana showing unique surficial features that do not appear to have been documented elsewhere.

The New York laboratory reports on a new record size for CVD laboratory-grown diamond.

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

A 3.03 ct stone submitted to GIA’s Bangkok laboratory was identified as a ruby from Mozambique with no indication of heating.

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, 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.

CARLSBAD, Calif. – Monday, Feb. 14 – The fifth annual Gianmaria Buccellati Foundation Award for Excellence in Jewelry Design was presented on Feb. 4 to GIA graduate Meghan Simmons from the GIA Carlsbad campus.

Researchers examine six specimens of banded turquoise, obtained through long-term cooperation of local miners in Zhushan County.

Unique diamond- and emerald-lensed spectacles from the Mughal Empire were tested in GIA’s New York laboratory.

An overview of the Winter 2021 Gems & Gemology content.

A reported new source of blue zircon in Malawi yields rough material for beautiful finished stones in the gem trade.

The Bangkok lab recently encountered a single round crystal of chondrodite in red spinel, a possible indicator of Burmese origin.

Analysis of a transparent yellow angular crystal inclusion in a Brazilian rock crystal quartz host suggests monazite.