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topaz
[ toh-paz ]
noun
- a mineral, a fluosilicate of aluminum, usually occurring in prismatic orthorhombic crystals of various colors, and used as a gem.
- 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.
topaz
/ ˈtəʊpæz /
noun
- 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
- oriental topaza yellowish-brown variety of sapphire
- false topazanother name for citrine
- a yellowish-brown colour, as in some varieties of topaz
- ( as adjective )
topaz eyes
- either of two South American hummingbirds, Topaza pyra and T. pella
topaz
/ tō′păz′ /
- A colorless, blue, yellow, brown, or pink orthorhombic mineral valued as a gem. Topaz occurs as transparent or translucent prisms in silica-rich igneous rocks, such as pegmatite, and in tin-bearing rock veins. Chemical formula: Al 2 SiO 4 (F,OH) 2 .
- Any of various yellow gemstones, especially a yellow variety of sapphire or corundum.
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Other Words From
- to·paz·ine [toh, -p, uh, -zeen, -zin], adjective
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Word History and Origins
Origin of topaz1
1225–75; < Latin topazus < Greek tópazos; replacing Middle English topace < Old French < Latin, as above
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Word History and Origins
Origin of topaz1
C13: from Old French topaze, from Latin topazus, from Greek topazos
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