Definition of topaz

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Topaz (n.) 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..

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Gem :: Gem (n.) A precious stone of any kind, as the ruby, emerald, topaz, sapphire, beryl, spinel, etc., especially when cut and polished for ornament; a jewel..
Danburite :: Danburite (n.) A borosilicate of lime, first found at Danbury, Conn. It is near the topaz in form..
Pycnite :: Pycnite (n.) A massive subcolumnar variety of topaz.
Topaz :: Topaz (n.) 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..
Chrysolite :: Chrysolite (n.) A mineral, composed of silica, magnesia, and iron, of a yellow to green color. It is common in certain volcanic rocks; -- called also olivine and peridot. Sometimes used as a gem. The name was also early used for yellow varieties of tourmaline and topaz..
Topazolite :: Topazolite (n.) A topaz-yellow variety of garnet.
Topaz :: Topaz (n.) Either one of two species of large, brilliantly colored humming birds of the Topaza, of South America and the West Indies..
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