Ruby and Sapphire from Muling, China
An emerging corundum deposit in northeastern China is discussed.
Red Cordierite from Madagascar (英语)
The gemological properties of the first documented occurrence of red cordierite, from Madagascar, are examined.
Hydrophane Opal Treatment
An opal rough is immersed in water and treated with oil and Opticon to observe effects on transparency and play-of-color.
Identification of “Pistachio” Colored Pearls Treated by Ballerina Pearl Co.
A report on the color treatment process for these intensely greenish yellow to yellowish green cultured pearls and the techniques for identifying them.
为斋蒲尔王公和现代权贵服务的珠宝商
走进一个不为西方人了解的世界——一个王公及其珠宝的世界,一个令现代商业和娱乐大亨以及皇族垂涎的世界。 看看现今采用珐琅 Kundan meena 珠宝和皇家气质的 polki 钻石制作的梦幻般的艺术品。
印度斋浦尔:祖母绿切割和交易中心
印度斋浦尔是全球宝石和珠宝行业重要的祖母绿切割和交易中心。 跟随 GIA 实地考察团队一起探访整个行业,了解公众或业内大部分成员都很难得见到的一家企业内部的错综复杂。
Two Large Natural Pearls Reportedly from Spondylus and Trochoidea Species Mollusks
Natural pearls of unusual size and unique appearance are retrieved from the west coast of Mexico and examined in GIA’s New York lab.
2015 年《宝石与宝石学》(Gems & Gemology) 冬季刊两大亮点:镁铝榴石柘榴石和蒙大纳州蓝宝石
《宝石与宝石学》(Gems & Gemology, G&G) 简报介绍了《宝石与宝石学》(Gems & Gemology) 2015 年冬季刊的内容概要。
Book Review: Collector’s Guide to Herkimer Diamonds
书评:Collector’s Guide to Herkimer Diamonds(《赫基默钻石收藏家指南》),作者:Michael R. Walter(迈克尔·R·瓦尔特)。
Two Large CVD-Grown Synthetic Diamonds Tested by GIA (英语)
Two near-colorless rounds, weighing 3.23 and 2.51 ct, were the largest CVD-grown synthetic diamonds GIA has examined.
Large Natural Fossil Blister Pearls from Tridacna (Giant Clam) Species
Two blister pearls attached to a host shell believed to have fossilized during the later Pleistocene period and discovered in southeastern Kenya are studied.
Grandidierite from Madagascar
An unfamiliar rough fragment acquired from Madagascar may point toward a new source of grandidierite.

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