- a mineral, a fluosilicate of aluminum, usually occurring in prismatic orthorhombic crystals of various colors, and used as a gem.
- citrine (def. 2).
- either of two South American hummingbirds, Topaza pella or T. pyra, having chiefly red and crimson plumage and a yellowish-green throat with a topaz sheen.
- a white or colourless mineral often tinted by impurities, found in cavities in igneous rocks and in quartz veins. It is used as a gemstone. Composition: hydrated aluminium silicate. Formula: Al 2 SiO 4 (F,OH) 2 . Crystal structure: orthorhombic
- a yellowish-brown variety of sapphire
- false topaz another name for citrine
- a yellowish-brown colour, as in some varieties of topaz
- (as adjective)
- either of two South American hummingbirds, Topaza pyra and T. pella
