chatoyancy

enUK
chatoyantcat's-eye quartz

cha·toy·ant

C0260200 (shə-toi′ənt)adj. Having a changeable luster.n. A chatoyant stone or gemstone, such as the cat's-eye.
[French, present participle of chatoyer, to shimmer like cats' eyes, from chat, cat, from Vulgar Latin *cattus, perhaps of African origin.]
cha·toy′an·cy n.

chatoyancy

the condition or quality of changing in color or luster depending on the angle of light, especially of a gemstone that reflects a single shaft of light when cut in cabochon form. — chatoyant, adj.See also: Gems
the condition or quality of changing in color or luster depending on the angle of light, especially of a gemstone that reflects a single shaft of light when cut in cabochon form. — chatoyant, adj.See also: Light
the condition or quality of changing in color or luster depending on the angle of light, exhibited especially by a gemstone that reflects a single shaft of light when cut in cabochon form. — chatoyant, adj.See also: Color