liroconite
noun
li·roc·o·nite
līˈräkəˌnīt
plural -s
: a basic hydrous aluminum copper arsenate Cu2Al(AsO4)(OH)4.4H2O occurring in monoclinic crystals of a sky-blue or verdigris-green color (hardness 2–2.5, specific gravity 2.88–2.99)
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