Chatoyancy

From Antique Jewelry University

Jump to: navigation, search

An optical phenomenon which appears as a bright band of light across certain gemstones, when cut as cabochons, reproducing the appearance of the narrowed pupil of a cat. Hence the more common name 'cat's eye'. The reflection is from fine inclusions, all parallel in one direction and is visible when the base of the cabochon is cut parallel with the direction of the inclusions.

Chatoyancy2.jpg
Lang Antiques
Lang Antiques