mineral

Malachite

Malachite, Cu₂CO₃(OH)₂

AI-generated identification · may be incorrect

Typically vivid green with banding, silky to vitreous luster, and monoclinic crystals; Mohs hardness 3.5–4, perfect cleavage, and specific gravity about 3.6–4.0. The blurred specimen appears green and fibrous/banded, consistent with malachite, though image quality limits certainty.

Identified August 19, 2026More mineral →

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Physical properties

Formation & geological history

A secondary copper-carbonate mineral formed by weathering and oxidation of copper sulfide deposits, generally in the near-surface zone; commonly associated with azurite, chrysocolla, and limonite. Deposits range from ancient to recent geologic ages.

Uses & applications

Used as an ornamental stone, cabochon, beads, pigment, and copper ore; attractive polished material is popular with collectors and jewelry makers. Avoid dust or ingestion because copper minerals can be toxic.

Geological facts

Malachite often displays concentric green banding and may pseudomorph after other minerals. It reacts weakly with dilute acid and leaves a green streak.

Field identification & locations

Common localities include the Democratic Republic of the Congo, Zambia, Russia, Morocco, Australia, and the southwestern United States. Identify it by intense green color, banding, softness, and association with copper-bearing rocks.