在同一块宝石中同时拥有紫水晶和黄水晶成色的透明、双色石英即紫黄晶或紫水晶-黄水晶。

了解玉须具备的要素。

Alexander Arnoldi explains the strategy of Arnoldi International and provides an update on some new high-quality materials.

Suggested Reading on Diamond Inclusions

实际上，拓帕石拥有非常广泛的颜色范围，除褐色外，还包括各种色调和色度的蓝色、绿色、黄色、橙色、红色、粉红色和紫色。 无色拓帕石产量众多，通常会被处理使其呈现蓝色。

碧玺有各种令人惊叹的颜色。 事实上，在所有宝石种类中，碧玺是拥有最广泛颜色范围的宝石之一，几乎可呈现所有色调，深浅不一。

在 2013 年图森宝石展上接受本次 GIA 记者专访时，Groom（格鲁姆）就宝石学和业务之间的重要关系提出了颇具启发性的指导意见。

Bill Vance 是特拉华州的一位有色宝石经销商，既对全球高品质有色宝石日益稀缺感到忧虑，又对呈现在中端买家面前的投资机会兴奋不已。

79 岁高龄的 Bob Halem（鲍勃·哈勒姆）喜欢回忆那段将他带入有色宝石世界的偶遇。

Bridges（布里奇斯）回顾了他父亲的生活和工作，这驱使他从家乡苏格兰前往非洲，在那儿发现了沙弗莱石，然后在珠宝界出人头地。 发现宝石为他带来无上的名望，但似乎也是诅咒的开始。

Specimens presented as rubellite tourmaline rough are found to be resin imitations with lead inserts.

Suggested Reading on Emeralds and their Inclusions

Three types of root amber beads submitted for identification are analyzed in Wuhan, China.

Cobalt is identified as the primary coloring agent in an intense blue specimen of gahnospinel at GIA’s Bangkok laboratory.

A large specimen of extraterrestrial peridot is analyzed at the Carlsbad laboratory.

Aegirine inclusions are observed in two samples of poudretteite from Mogok.

A report from the 37th IGC, held in late October 2023 in Tokyo.

Large blue and pink diamonds were among the top lots of the fall auction season, including the most expensive auction jewel of 2023.

Several G&G contributors are recognized for their work on the latest volume in the Reviews in Mineralogy & Geochemistry series.

The Antwerp lab examines CVD laboratory-grown diamonds where HPHT processing resulted in relatively low color grades.