mineral

Malachite

Malachite — Cu₂CO₃(OH)₂, hydrated copper carbonate hydroxide

AI-generated identification · may be incorrect

Bright green with likely botryoidal or fibrous texture and silky to vitreous luster; Mohs hardness 3.5–4, monoclinic crystal system, poor cleavage, and specific gravity about 3.6–4.0. The specimen appears rough and possibly attached to dark host rock.

Identified August 19, 2026More mineral →

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Physical properties

Formation & geological history

Forms as a secondary copper mineral in the oxidized zones of copper deposits, often by alteration of primary copper sulfides; most examples formed during relatively recent near-surface geological processes rather than at one specific age.

Uses & applications

Used as an ornamental stone, pigment, jewelry material, and copper ore; polished malachite is popular with collectors. Avoid dust or ingestion because copper minerals can be hazardous if ground or swallowed.

Geological facts

Concentric green banding and botryoidal surfaces are characteristic, though not clearly resolved here. Common look-alikes include chrysocolla, turquoise, and dyed carbonate minerals.

Field identification & locations

Commonly found in Zambia, the Democratic Republic of the Congo, Russia, Australia, Arizona, and New Mexico. Identify by vivid green color, banding, softness, and reaction to dilute acid; confirmation requires testing because the image is not diagnostic.