|1.||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: Al2SiO4(F,OH)2. Crystal structure: orthorhombic|
|2.||oriental topaz a yellowish-brown variety of sapphire|
|3.||false topaz another name for citrine|
|4.||a. a yellowish-brown colour, as in some varieties of topaz|
|b. (as adjective): topaz eyes|
|5.||either of two South American hummingbirds, Topaza pyra and T. pella|
|[C13: from Old French topaze, from Latin topazus, from Greek topazos]|
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.