1. Min. 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.
2. Zool. 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.
Note: ☞ The two tail feathers next to the central ones are much longer that the rest, curved, and crossed. The Throat is metallic yellowish-green, with a tint like topaz in the center, the belly is bright crimson, the back bright red. Called also topaz hummer.
False topaz. Min. See the Note under Quartz.
n 1: a yellow quartz [syn: false topaz, common topaz]
2: a mineral (fluosilicate of aluminum) that occurs in crystals
of various colors and is used as a gemstone
3: a light brown [syn: tan]
Heb. pitdah (Ezek. 28:13; Rev. 21:20), a golden yellow or
"green" stone brought from Cush or Ethiopia (Job 28:19). It was
the second stone in the first row in the breastplate of the high
priest, and had the name of Simeon inscribed on it (Ex. 28:17).
It is probably the chrysolite of the moderns.