Presents a simplified but comprehensive classification of gem tourmaline species based on quantitative measurement of six common major elements.

The president of Oregon’s Desert Sun Mining and Gems provides the outlook for activity at the Ponderosa sunstone mine.

An update on the activity at Potentate’s Montana deposits.

Spinel is often inclusion free but occasionally showcases unusual inclusions.

A gem dealer gives back to the mining communities that have supplied gems over the course of his career.

A 283.74 ct rough tsavorite from Merelani, Tanzania, yields a square cushion-cut gemstone weighing 116.76 ct.

Investigates trace-element chemistry of freshwater natural pearls from North America and China with LA-ICP-MS and uses LDA to identify their origins.

A unique doublet displaying a yellowish chatoyant sheen is examined by the Tokyo lab.

Cat’s-eye nephrite jade from Washington State. Washington Jade (Edmonds, Washington) made its Tucson debut at the AGTA show with nephrite jade from Washington State.

Researchers from GIA’s Bangkok laboratory seek to identify low-temperature heat treatment in basalt-related blue sapphires.

矿物内含物揭示了大陆的构造，并帮助研究人员确定钻石的年龄。

戴比尔斯积极应对波动，FTC 发出有关实验室制造钻石的警告。另附：揭开 302.37 克拉 Graff Lesedi La Rona（我们的光）的神秘面纱。

看看这颗鲜艳的蓝色蓝宝石的开采和区别特征。

复兴主义珠宝的灵感来源于过去 — 能将我们与丰富的人类文明史联系起来。

身为地质学家和出版商的他取得了研究宝石学家 (GG) 文凭，因此可以和访问他所运营的地球科学网站——Geology.com 的访客分享更多有关宝石材料的信息。

自古以来，蝴蝶结一直都是珠宝与时尚的流行图形和修饰格调，它频频出现，又不断演变，反映每个时代的风格。

Review of Narrative Jewelry: Tales from the Toolbox by Mark Fenn.

Unusually large prismatic pargasite inclusions observed in a Kashmir sapphire submitted to the Carlsbad lab for origin determination.

Examination of a type IaB diamond that exhibited instantaneous 2803 cm–1 FTIR absorption shortly after exposure to an ultra-short-wave UV source.

Provides a visual guide to the internal features of natural, synthetic, and treated diamonds.