A 24.05cts. Untreated Natural Cat's Eye Chrysoberyl
Lot No. ：CCJD-CEC-211202
Grade：A natural chrysoberyl*, untreated, cat's eye, GRS report.
Shape and Cutting Style：Oval cabochon
* Chrysoberyl cat's eye is a gemstone quality variety of beryllium aluminum oxide which exhibits a rare optical trait known as 'chatoyancy'. Chatoyancy is the unique ability to reflect light in a way that resembles the slit eye of a cat, hence the name 'cat's eye'. Chrysoberyl is considered the 'original' cat's eye gem, and is in fact the only gem that can be traded as simply 'cat's eye'. Unlike most other cat's eyes, chrysoberyl can exhibit very sharp and distinct eyes under almost any kind of light, which makes it extremely attractive and desirable, especially combined with its superior level of hardness and durability. Color change chrysoberyl is considered to be one of rarest and most valuable gems today. "Milk and honey" is a term commonly used to describe the color of the best cat's eyes. The effect refers to the sharp milky ray of white light normally crossing the cabochon as a center line along its length and overlying the honey-colored background. The honey color is considered to be top-grade by many gemologists but the lemon yellow colors are also popular and attractive. Cat's eye material is found as a small percentage of the overall chrysoberyl production wherever chrysoberyl is found. Cat's eye really became popular by the end of the 19th century when the Duke of Connaught gave a ring with a cat's eye as an engagement token; this was sufficient to make the stone more popular and increase its value greatly. Until that time, cat's eye had predominantly been present in gem and mineral collections.
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