Moolooite

Moolooite is a rare blue-green mineral with the formula Cu(C₂O₄)·n(H₂O) (n<1) (copper(II) oxalate hydrate). It was discovered in Bunbury Well, Mooloo Downs station, Murchison, Western Australia in 1986.<ref name=clarke-williams>Template:Cite journal</ref> It has an orthorhombic crystalline structure, and is formed by the interaction of bird guano with weathering copper sulfides.

A second occurrence is reported from the Sainte-Marie-aux-Mines silver mining district of Vosges Mountains, France.<ref name=clarke-williams/>

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