Widespread carbonate mineral of copper, a hydrous copper carbonate, CuCO(OH). 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. It is found in Siberia, France, Namibia, and Arizona. Malachite has been used as an ornamental stone and as a gemstone.

This entry comes from Encyclopædia Britannica Concise.
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