Chrysoberyl is a beryllium aluminum oxide, a mineral species distinct from beryl. It occurs in yellow to yellowish-green faceted stones and, when it contains fine needle-like inclusions oriented parallel to the base of a cabochon, as cat's eye chrysoberyl, which displays chatoyancy.

What does GIA's report say about a cat's eye chrysoberyl?

On a GIA Cat's Eye Chrysoberyl Report the phenomenon field prints Displaying Chatoyancy, which records that the stone shows the effect. It is not a judgement of the eye's sharpness, straightness, centring or strength, and GIA does not grade or provide quality analysis for coloured stones. The report also carries no treatment field, no geographic origin field and no characteristics panel, so treatment, origin and clarity statements on this site are Crescent Gems' own.

金绿宝石裸石

金绿宝石是什么

金绿宝石是铍铝氧化物，与蓝宝石（刚玉）是不同的矿物，也不同于绿柱石。常见颜色为黄色、黄绿色和带棕调的绿黄色；具有猫眼效应的称为金绿宝石猫眼，具有变色效应的品种称为变石（亚历山大石）。本系列以刻面金绿宝石为主，弧面型猫眼可在金绿宝石猫眼中浏览。

来源与报告

Crescent Gems 在斯里兰卡采购宝石，大部分在自家工坊切磨。页面上写的产地是我们自己的采购记录，而不是实验室的结论。价值较高的宝石附有美国宝石研究院（GIA）报告，每个商品页面列出该宝石所附的报告。金绿宝石所用的报告类型不一定设有产地或处理栏目，报告写了什么，我们就照录什么。每件宝石的页面写明是否经过加热；化验报告若列有处理项目，我们按报告原文照录。