The Hong Kong laboratory recently examined a 14.36 ct pink-orange cushion mixed-cut specimen.

Resin materials marketed as imitation ivory were recently acquired by a GIA gemologist.

Recently, a 2.05 ct blue sapphire was sent to Guild Gem Laboratories for identification.

这一系列珠宝图片说明了金属加工技术如何展示宝石和珠宝设计。

GIA 研究人员通过分析 90,000 多颗天然粉红色钻石，来更好地理解这种稀有而美丽的钻石的形成原因和颜色成因。

美国假日销售额预测看好。GIA 校友作品亮相苏富比香港拍卖会。GIA 校友作品亮相苏富比香港拍卖会。

美国消费者信心十足，阻止了可能出现的经济衰退。

一支抒情的舞蹈：时而一个大踢腿，大胆闪烁着丰富的色彩，时而是细碎的舞步，闪现出星星点点的光芒。

随着新的宝石处理方法和实验室制造的宝石进入市场，GIA 服务和仪器解决了许多这方面的问题。

国务院告知业界，收紧监管链报告的工作完成得不是很好。

Reviews the mining history, market impact, and properties of ruby from northern Mozambique near Montepuez, now the world’s most productive source.

Twelve pink sapphires undergo low-temperature heat treatment and reveal a correlation with the 3232 cm-1 FTIR peak.

The interior structures of pearls are always of interest, as they are never revealed until the analysis begins.

Shows how the color of Madagascar sapphire is lightened with heating to relatively low temperatures below 1350°C.

Although opals generally contain water in their structure, fluid inclusions large enough to be resolved with the microscope are rare; those that can be seen with the unaided eye are exceedingly rare.

A 7.54 ct natural emerald containing a 3D helical inclusion is examined by the Tokyo laboratory.

Conclusively identifying the origin of a “hollow” pearl filled with foreign materials proves challenging.

Examines the basic characteristics of kimberlites and their relationship with diamonds.

A phantom sapphire crystal within a host sapphire crystal was recently examined at GIA’s Carlsbad laboratory.

Characterizes black nephrite from a deposit in the Guangxi region that appears to be part of a large-scale jade formation belt in southern China.