mineral

Malachite on limonite matrix

Malachite, Cu₂CO₃(OH)₂, with likely limonite/goethite iron-oxide matrix

AI-generated identification · may be incorrect

Bright green, vitreous to silky crystals and aggregates on an ochre-brown matrix; malachite is monoclinic, Mohs hardness 3.5–4, with perfect cleavage and specific gravity about 3.6–4.0. The image suggests a small mineral specimen, but crystal details are not definitive from the photo alone.

Identified September 27, 2026More mineral →

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Physical properties

Formation & geological history

Malachite forms through near-surface oxidation of copper deposits, commonly in arid or weathering environments, often alongside azurite and iron oxides. It is generally geologically young relative to its host rocks; the specimen’s age cannot be determined visually.

Uses & applications

Collected as a display mineral and used decoratively; malachite has also been cut for beads and ornamental objects, though its softness and copper content limit many uses.

Geological facts

Its intense green color comes from copper. Malachite commonly occurs as botryoidal crusts, bands, or crystalline aggregates in the oxidized zones of copper ore deposits.

Field identification & locations

Look for vivid green color, relatively low hardness, and association with copper minerals; common sources include the Democratic Republic of the Congo, Zambia, Russia, and Arizona. Avoid inhaling dust or using acids when testing copper minerals.