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据报道，一批产自纳米比亚的罕见硼铝石最近被送至 GIA 曼谷鉴定所进行研究。 本文报道了这组藏品的五个样本的初步检测情况及其照片。

根据化学分析检查长石的地理起源，并反驳墨西哥矿材被运送至中国进行处理并作为中国矿材出售这一指控。 对产自墨西哥、蒙古和美国的样本进行分析。

散发难闻气味的珍珠

据报道在莫桑比克北部新发现的魅力红宝石开始出现在泰国的宝石市场。 这些宝石类似于坦桑尼亚 Winza（汶沙）矿区的红宝石，但本项研究表明，可通过显微镜检查将它们区别开来。

虽然到目前为止，高品质的天然尖晶石无需经历大规模的处理流程，但市面上仍流通着部分经加热处理的商品。 本证书确定了经加热处理的尖晶石的识别标准。

检验次生液体内含物（也被称为“指纹”）在极高温度下的状况，及其在检测热处理时发挥的作用。

Since late 2007, rubies and sapphires have been mined by hand methods from both eluvial and primary deposits at Winza in central Tanzania.

This article discusses the history and ongoing development of GIA's color grading system, and explains how its laboratory applies it.

The finest and rarest emeralds are sometimes said to have an optical effect called gota de aceite.

High-quality CVD-grown diamonds, comparable in color and clarity to natural diamonds, can be identified using a combination of gemological and spectroscopic properties.

This article reviews the GIA Laboratory’s history of reporting on certain types of graining which are often the only characteristics present in large, high-clarity, high-color diamonds.

In early 2004, the GAAJ laboratory in Japan issued a lab alert about rubies they had seen that had large numbers of fractures filled with high-lead-content glass, which made them appear very transparent.