Offers the first detailed summary of amber from the Vietnamese island of Phu Quoc and a comparison with Baltic, Dominican, and Burmese material.

A remarkable large calcite recently seen at the GJX show displayed a dazzling array of colors resulting from both high dispersion and birefringence (C.S. Hurlbut and C.A. Francis, “ An extraordinary ...

The spinel exhibited was reportedly mined in Makoko, a village in the southern part of the country. According to Smith, the early findings from this location were small and very poor in quality, until ...

Examination of a gigantic South Sea bead cultured pearl reveals an intriguing internal structure.

You’re in for a delectable treat with our Spring 2025 issue of Gems & Gemology! We cover detecting heated corundum, the rare and remarkable Winston Red diamond, and an extraordinary Renaissance jewel ...

Bright green and nearly transparent jade from Guatemala, similar to jade from Myanmar, was available in Tucson.

The Bangkok laboratory studies 35 loose non-nacreous pearls from a wide range of marine mollusk species.

In general, 2025 was a strong year for Tucson vendors at the various shows. Like last year, foot traffic was generally low with moments of high activity, while buying remained focused. Vendors who ...

A report from the New York laboratory on colorless and near-colorless CVD gem diamonds produced by the Texas-based company Plasmability.

GIA has evaluated more than 30 rare and historically significant jewels ahead of Christie’s Magnificent Jewels auction, taking place on June 17 in New York.

In the jewelry world, innovation continuously drives the industry forward, with jewelry designers often at the forefront of the creative attempt. The author found two bangles exemplifying this ...

カリフォルニア州カールスバッド ー 2025年6月2日 ー GIA（米国宝石学会）は年内中に、ラボラトリーグロウン (合成)ダイヤモンドの品質を表現する記述用語の使用を開始し、その後はGIAが天然ダイヤモンドのために開発したカラーとクラリティの用語体系はラボラトリーグロウン (合成 ...