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An azure blue vitreous mineral of basic copper carbonate, Cu3(CO3)2(OH)2, used as a copper ore and as a gemstone.
(Minerals) an azure-blue mineral associated with copper deposits. It is a source of copper. Composition: copper carbonate. Formula: Cu3(CO3)2(OH)2. Crystal structure: monoclinic
1. a blue mineral, a hydrous copper carbonate, Cu3(CO3)2(OH)2, an ore of copper.
2. a gem of moderate value cut from this mineral.
A dark-blue copper carbonate mineral having a glassy luster and occurring in various forms. It is often found together with malachite. Azurite is used as a source of copper, as a gemstone, and as a dye.