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malachite
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malachite azurite with malachite crystals
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malachite
malachite Malachite after azurite, a monoclinic copper carbonate, Tsumeb Mine, Namibia.

malachite

mineral
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malachite, a minor ore but a widespread mineral of copper, basic copper carbonate, Cu2CO3(OH)2. Because of its distinctive bright green colour and its presence in the weathered zone of nearly all copper deposits, malachite serves as a prospecting guide for that metal. Notable occurrences are at Nizhny Tagil, Siberia; Chessy, France; Tsumeb, Namibia; and Bisbee, Ariz., U.S. Malachite has been used as an ornamental stone and as a gemstone. It is more abundant and widespread than azurite, with which it is usually found. For detailed physical properties, see carbonate mineral (table).

This article was most recently revised and updated by Virginia Gorlinski.