
Jaipur, India: The Global Gem and Jewelry Power of the Pink City
Examines Jaipur’s role as a colored stone cutting and jewelry manufacturing center, with profiles of 17 companies and their factory, trading, and retail operations.

Exhibition Review: *Illuminations, from Earth to Jewel*
A review of Illuminations, from Earth to Jewel, at the Museum of Mineralogy at the ParisTech School of Mines in France.

昆士兰蛋白石矿场:独特的澳大利亚砾岩蛋白石的产地
砾岩蛋白石正在变得越来越受欢迎。 澳大利亚的昆士兰中部是这种宝石的产地,有十几个砾岩蛋白石矿场。 和 GIA 实地宝石学家一起来了解关于这种独特宝石的更多信息。




大而罕见的钻石揭示地幔的内在活动
这是文章“来自于地球深层地幔中金属液体的宝石级大钻石”的扩展摘要,发表于2016年12月16日的《科学》 期刊。 GIA 博士后研究员Evan Smith(埃文·史密斯)博士是整篇文章的主要作者。




Diamond Growth from C–H–N–O Recycled Fluids in the Lithosphere: Evidence from CH₄ Micro-inclusions and δ¹³C–δ¹⁵N–N Content in Marange Mixed-habit Diamonds
Article was published in Lithos Volume 265, 68-81.



Iridescent Inclusion in Tanzanite
A tanzanite displayed crystallographically aligned, vividly iridescent colors resulting from fine separations along the stone’s cleavage planes.

Unusual Purple Inclusion in Emerald
Microscopic examination of an emerald revealed a purple banded inclusion with the appearance and optic character of fluorite.

Screening of HPHT Synthetic Melee With Natural Diamonds
A screening service allows the lab to screen for synthetic material in diamond melee parcels.

A New Deposit of Gem-Quality Grandidierite in Madagascar (英语)
Reviews the properties of exceptionally pure grandidierite from a new source.

Sapphires from the Sutara Placer in the Russian Far East (英语)
Studies the formation and chemical composition of the largely unexamined alluvial sapphires from Russia’s Jewish Autonomous District.

Update on Colored Gemstone Mining in Tanzania
Reports on an expedition to many known and new Tanzanian gem localities.

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