Topaz /(?)/

To·paz

Topaz

n.
  1. A mineral occurring in rhombic prisms, generally yellowish and pellucid, also colorless, and of greenesh, bluish, or brownish shades. It sometimes occurs massive and opaque. It is a fluosilicate of alumina, and is used as a gem. (Min.)
  2. Either one of two species of large, brilliantly colored humming birds of the genus Topaza (Topaza pella or Topaza pyra), of South America and the West Indies. (Zool.)

Phrases & Compounds
False topaz
See the Note under Quartz.