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.

金綠寶石裸石

甚麼是金綠寶石

金綠寶石是鈹鋁氧化物，與藍寶石（剛玉）屬不同礦物，亦有別於綠柱石。常見顏色為黃色、黃綠色及帶啡調的綠黃色；具貓眼效應的稱為金綠寶石貓眼，具變色效應的品種稱為亞歷山大變石。本系列以刻面金綠寶石為主，蛋面貓眼可在金綠寶石貓眼瀏覽。

來源與報告

Crescent Gems 在斯里蘭卡採購寶石，大部分在自家工場切割打磨。頁面所列產地是我們自己的採購紀錄，並非化驗所的結論。價值較高的寶石附有美國寶石學院（GIA）報告，每個產品頁面列出該寶石所附的報告。金綠寶石所用的報告類型未必設有產地或處理欄目，報告寫甚麼，我們便照錄甚麼。每顆寶石的頁面均註明是否經過加熱；如化驗報告載有處理項目，我們按報告原文列出。