

书评:《Gem: The Definitive Visual Guide》(宝石:权威视觉指南)
《Gem: The Definitive Visual Guide》(宝石:权威视觉指南)书评。

Pyrope-Spessartine Color-Change Garnet with a High Grossular Component
A color change in rough garnet is observed and plotted in GIA’s Carlsbad lab.

Japanese Jadeite: History, Characteristics, and Comparison with Other Sources
Examines the sources, color, texture, and chemical composition of jadeite from Japanese deposits.

GIA发现覆合钻石
Analysis of a diamond graded Fancy blue revealed a CVD synthetic overgrowth on natural diamond.



责任珠宝业委员会 (RJC) 专门小组在 2017 年巴塞尔国际珠宝钟表展上探讨有色宝石问题
责任珠宝业委员会在 2017 年巴塞尔国际珠宝钟表展上对有色宝石公司认证所面临的挑战和问题进行了探讨。





针对产自 Baw Mar 矿(缅甸摩谷)的蓝色蓝宝石的深入宝石学研究
GIA 实地宝石学家在 2013 年、2014 年和 2015 年考察过 Baw Mar 的运营。 在本次研究中,我们分析了在两个独立考察期间收集的样本。




Atypical “Beading” in the Production of Cultured Pearls from Australian Pinctada maxima
In 2011, the authors began to see cases of low-quality natural pearls being used as unconventional “beads” for cultured nacre growth.


“嬉皮”设计师兼估价师追随本心,重新点燃当地校友分会的激情
研究宝石学家 Rebecca Buys(丽贝卡·拜斯)是设计师兼估价师,拥有充实的事业历程,为加利福尼亚州圣地亚哥的 GIA 校友指点机遇。

Cuprian Liddicoatite Tourmaline
Identifies 13 copper-bearing tourmalines, which have traditionally been assumed to be elbaite species, as liddicoatite.

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