Results from GIA’s recent testing of a 5.19 ct CVD synthetic diamond, the largest it has examined to date.

A rare Tasmanian trapiche-type sapphire, found during a field expedition, is examined.

Reports on a recently discovered eluvial deposit of honey yellow danburite with excellent transparency.

Describes the chemical, morphological, and microscopic properties of the first gem-quality synthetic emeralds ever produced, offering a historical perspective on their development.

Dramatic growth features are found on the surface of a titanite specimen from Russia.

A turquoise bead is found to have an artificial pyrite and resin matrix.

Unusual doublets created from two different synthetics are revealed at the Carlsbad laboratory.

The chemical composition and spectroscopic characteristics of 14 gold sheen sapphires are examined.

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

An apatite crystal cluster, notable for its morphology and size, is found in a feldspar specimen.

Recounts an expedition to Mozambique’s important deposits of ruby, spinel, and tourmaline, which have yet to be fully explored.

Examines Jaipur’s role as a colored stone cutting and jewelry manufacturing center, with profiles of 17 companies and their factory, trading, and retail operations.

A review of Illuminations, from Earth to Jewel, at the Museum of Mineralogy at the ParisTech School of Mines in France.

砾岩蛋白石正在变得越来越受欢迎。 澳大利亚的昆士兰中部是这种宝石的产地，有十几个砾岩蛋白石矿场。 和 GIA 实地宝石学家一起来了解关于这种独特宝石的更多信息。

展览的亮点包括数颗荣获大奖的钻石、巨大的石英晶体、不寻常的雕刻宝石以及代表多个时代的设计风格的珠宝作品。

钻石行业在 2016 年缓慢复苏，有色宝石注入了一剂强心针。 混乱的各种信号没有给 2017 年留下明确的指向。

淘拣是一种深受澳洲人喜爱的特殊采矿活动。 澳大利亚国土辽阔，多种类型的宝石资源矿藏丰饶。 跟随 GIA 实地宝石学团队前往澳大利亚，感受南半球对宝石淘拣的热情。

这是文章“来自于地球深层地幔中金属液体的宝石级大钻石”的扩展摘要，发表于2016年12月16日的《科学》 期刊。 GIA 博士后研究员Evan Smith（埃文·史密斯）博士是整篇文章的主要作者。

探讨为何近年来进入市场的超大钻石数量大幅增长。

宝石学实地考察所面临的艰苦条件与从军 30 载的海军老将对宝石的热爱相比，简直微不足道。