gold ore and malachite
gold ore and malachite. Malachite . Malachite is a copper carbonate hydroxide mineral, with the formula Cu 2 CO 3 opaque, green banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and spaces, deep underground, where the water table and hydrothermal ...