Malachite

Copper carbonate hydroxide

A vivid green copper mineral famous for rings and flowing bands.

DR Congo

Sample content • provenance shown broadly for demonstration

At a glance

Fast Facts

Cu₂CO₃(OH)₂

Mohs 3.5–4

Monoclinic

DR Congo

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The Story

Malachite forms near copper deposits where oxygen-rich groundwater changes older copper minerals. Its alternating light and dark bands record repeated layers of crystal growth.

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Where Does It Fit?

FormulaCu₂CO₃(OH)₂

Crystal systemMonoclinic

FormationForms in oxidised zones above copper deposits