Characterization of Peridot from Sardinia, Italy
Gem-quality peridot is occasionally found as mantle xenoliths within basalts near Pozzomaggiore.
据报道产自莫桑比克的红宝石
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。
Purplish Pink Spinel from Tajikistan: Before and After Cutting
In November 2008, the Bangkok laboratory was fortunate to have an opportunity to briefly examine seven stones that the client had faceted from this parcel.
The French Blue and the Hope: New Data from the Discovery of a Historical Lead Cast
With the use of modern tools and technology, this article sheds light on the history and provenance of both the French Blue and the Hope diamonds.
Demantoid from Val Malenco, Italy: Review and Update
New data are presented for demantoid from Val Malenco, Italy, as obtained by classical gemological methods.
Ruby and Sapphire Production and Distribution: A Quarter Century of Change
During the past 25 years, the corundum market has been transformed from one of medium to high-priced gems to one that encompasses nearly all price ranges.
美国宝石研究院 (GIA) 鉴定所“D 到 Z”钻石成色分级 (英语)
This article discusses the history and ongoing development of GIA's color grading system, and explains how its laboratory applies it.

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