mineral

Polished malachite

Malachite, Cu₂CO₃(OH)₂

AI-generated identification · may be incorrect

A copper carbonate hydroxide mineral, typically banded vivid green with silky to vitreous luster; Mohs hardness 3.5–4, monoclinic crystal system, perfect cleavage, and specific gravity about 3.6–4.0. The concentric botryoidal banding is characteristic, though this specimen appears cut and polished.

Identified August 15, 2026More mineral →

Explore Polished malachite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Forms as a secondary copper-mineral in the oxidized zones of copper deposits, commonly replacing or coating other minerals. It is geologically young relative to host rocks, forming through groundwater alteration rather than as a primary igneous, sedimentary, or metamorphic rock.

Uses & applications

Used for ornamental carvings, cabochons, beads, polished slabs, pigments, and mineral collecting; it is generally unsuitable for durable construction. Avoid dust or acids because copper-bearing malachite can be toxic if inhaled or ingested.

Geological facts

Its green color and banding result from variable copper content and repeated growth cycles. Major sources include the Democratic Republic of the Congo, Zambia, Russia, Australia, Namibia, and Arizona, USA.

Field identification & locations

Identify it by intense green concentric bands, relatively high density, softness, and fizzing in dilute acid; blue-green copper staining may occur. Distinguish from dyed marble or resin by its natural band structure and mineral density.