olivenite

A mineral, Cu₂(AsO₄)(OH), a basic arsenate of copper, that is brown, olive green, or gray in color and found in copper deposits.

An arseniate of copper, usually of an olive-green color, occurring in prismatic crystals, and also in reniform, granular, and fibrous crusts.

An olive-green mineral, a hydrous arseniate of copper (Cu2(AsO4)(OH)); olive ore.

An orthorhombic copper arsenate mineral with the chemical formula Cu2AsO4OH.

rare green to black mineral consisting of hydrated copper arsenate that is found in copper deposits