An unusual laser manufacturing remnant, possibly once used to guide a gem cutter, was left behind in a clock-like shape.

Chronicles a visit to the high desert of eastern Oregon to examine commercial sources of this natural copper-bearing feldspar.

The history and mysteries behind a treasure of jewels hidden during the 1600s, a window to the past being fully opened to the public for the first time since a chance discovery a century ago.

在 GIA 卡尔斯巴德校区的演示会期间，毕业生为在校学生提供职业发展建议。

研究宝石学家 H. “Gio” Giovanni（H.·吉奥·吉奥瓦尼）与 GIA 卡尔斯巴德学生分享了他的创新珠宝设计技能和品牌实践。

2013 年 10 月，GIA 曼谷实验室对 2012 年 9 月考察期间收集的样本进行了研究。

GIA 博物馆展览“极尽奢华：Tony Duquette-Hutton Wilkinson 珠宝展览”展出了好莱坞著名设计师的珠宝设计作品。

Specimen sold as black diamond identified as ceramic material commonly used in hard-plating applications

宝石学实验室的另一份报告指出，一包未经披露的合成品引发了一些新问题 — 宝石市场内渗透了多少合成品，对于具体数量存在相当大的分歧。

GIA（美国宝石研究院）资深行业分析师 Russell Shor （罗素·肖尔）向大型宝石矿上市公司Gemfields 首席执行官 Ian Harebottle（伊恩·蛤雷波特尔）谈到公司致力于利用广告和推广活动来促使整个行业的华丽提升。

This is the editorial article for the Summer 2013 issue of Gems & Gemology

How variations in UV lamp output can affect observed fluorescence color and intensity.

Analysis of 21 rough and gem-quality samples offers an update on the composition and properties of this pale green gem from the Italian Alps.

A simple chart on optical defects in diamond, including those that produce coloration and fluorescence colors.

How contrast patterns can increase perceived brightness and optimize a gemstone's appearance.

本文简要概述了检测化学蒸气沉淀法生长的合成钻石所用方法。

A coral specimen that was coated—not dyed—with a coloring agent only on the surface, an unusual method evidenced by microscopic features.

巴西米纳斯吉拉斯州钻石开采的首次记载和照片幻灯片可以追溯到 18 世纪初。

Raman spectroscopy reveals orangy red neptunite in identification of a 11.78 ct faceted “black” octagonal modified step-cut stone.

A recent lab examination at GIA New York revealed an inclusion in a rectangular Fancy Yellow called "pareidolia," which means it was a resemblance of the scales and form of a fish.