Chatoyancy - Wikipedia Coined from the French œil de chat, meaning cat's eye, the chatoyant effect is typically characterized by one or more well-defined bands of reflected light, reminiscent of a cat's eye, which appear to glide across a gem's surface as the object is moved, or when the observer moves while viewing it
Chatoyant Gems: The Mystery of Cats-Eye Gems Explained Excellent specimens of chrysoberyl exhibit the finest chatoyance, and tiger's-eye is the chatoyant gem most widely used in jewelry Chatoyance occurs in stones that contain a large number of very thin parallel inclusions within the stone, known as a "silk "
chatoyant - Wiktionary, the free dictionary chatoyant (plural chatoyants) (mineralogy) A hard stone, such as the cat's-eye, which presents on a polished surface, and in the interior, an undulating or wavy light
What is Chatoyancy (Cat’s Eye Effect) in Gemstones The term chatoyancy comes from the French word “chatoyant,” which means “shiny” or “reflecting light,” and is derived from the word “chat” (cat) This optical phenomenon occurs when light reflects off fibrous or needle-like inclusions within a gemstone, producing a distinct, narrow band of light that moves as the gemstone is