



Atypical Bead Cultured Pinctada maxima Pearls Nucleated with Freshwater Non-Bead Cultured Pearls

GIA 图书馆十佳数字化文献






Color Classification and Stability of Queen Conch Pearls
Color stability experiments show that the color of Queen conch shell and pearls may shift in hue and/or saturation under X-ray radiation or short-wave UV radiation.


新矿物以 GIA 理事 Barbara Dutrow(芭芭拉·达特罗)博士的名字命名以表敬意
加利福尼亚州卡尔斯巴德 — 2020 年 2 月 26 日 – 新发现的矿物种别 Dutrowite 属于碧玺族,与 GIA 理事 Barbara L. Dutrow(芭芭拉·L.·达特罗)博士同名。


《宝石与宝石学》(Gems & Gemology) 2019 年冬季刊有色宝石原产地
加利福尼亚州卡尔斯巴德 — 2020 年 2 月 3 日 — 最新一期的 GIA 专业季刊《宝石与宝石学》(Gems & Gemology) 2019 年冬季刊集中讨论了宝石学鉴定所有色宝石地理原产地鉴定的科学原理、问题和限制。

Geographic Origin Determination of Blue Sapphire (英语)
In some cases, the value of a sapphire depends strongly on its geographic origin. This article details the origin data GIA has collected for blue sapphire and describes its methodology for using the data in geographic origin determination.


Geographic Origin Determination of Ruby (英语)
The world ruby market has undergone dramatic change in recent years, especially with the development of ruby mining in Mozambique. This contribution outlines GIA’s methods and criteria for establishing the geographic origin of ruby.

The Geographic Origin Dilemma
An overview of the geographic origin complexities facing the gem and jewelry industry today.

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