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**Chemical formula:** Cu₂CO₃(OH)₂ **Hardness:** 3.5‒4 **Density:** 3.9 g/cm³ **Crystal system:** Monoclinic **Luster:** Adamantine to vitreous **Description:** Malachite is a copper carbonate hydroxide mineral, recognizable by its distinct green color, with shades from black-green to pale green. It is opaque and often found in powder form or in botryoidal and stalagmitic aggregates. Occasionally, malachite also forms small columnar and acicular crystals. Historically, it has been used as a gemstone, a mineral pigment, and as a low-grade source of copper ore. ## Keywords mineral malachite texture color ornamental stone semi-precious gemstone
