In gemology, chatoyancy (/ʃəˈtɔɪ.ənsi/ shə-TOY-ən-see), also called chatoyance or the cat's eye effect, is an optical reflectance effect seen in certain...

China, where it is mined for use as a decorative stone due to its chaotic chatoyancy and brecciated structure. Ranging in colour from brownish-red, to blue-grey...

apparently acquired its name due to its resemblance to feathers due to its chatoyancy. Seraphinite is named after the biblical seraphs or seraphim angels. With...

(orthoclase and sodium-rich plagioclase). Polished moonstones often display chatoyancy ("cat's eye" effect), where a luminous streak appears through the stone...

phenomena, such as asterism (the display of a star-shaped luminous area) or chatoyancy (the display of luminous bands, which appear to move as the specimen is...

its price, color and chatoyancy are the main factors. Chatoyant translucent varieties are the most sought after, as while chatoyancy already being uncommon...

masses tend to be chatoyant, meaning they have a varying luster. This chatoyancy can be subtranslucent to opaque. Cholorastrolite is a variety of pumpellyite:...

feathers. Approximately 10 per cent of the rough material would also exhibit chatoyancy when polished. Most cut pezzottaite gems are under one carat (200 mg)...

in total solar eclipses. camera obscura Cathodoluminescence Caustics Chatoyancy, cat's eye gems such as chrysoberyl cat's eye or aquamarine cat's eye...

eye Fibrous gold, red-brown or bluish colored chalcedony, exhibiting chatoyancy. Prasiolite Green Transparent Rutilated quartz Contains acicular (needle-like)...