mineral

Chrysocolla in Malachite

Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)

AI-generated identification · may be incorrect

Hardness: 2-4 (Chrysocolla) to 3.5-4 (Malachite); Color: Vibrant green banding with cyan to deep blue patches; Luster: Vitreous to sub-adamantine (Malachite) or waxy/dull (Chrysocolla); Crystal Structure: Monoclinic (Malachite) / Amorphous (Chrysocolla); Specific Gravity: 2.0-4.0.

Hardness: 2-4 (Chrysocolla) to 3
Color: Vibrant green banding with cyan to deep blue patches

Identified March 26, 2026More mineral →

Explore Chrysocolla in 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

Secondary mineral formed in the oxidation zones of copper ore deposits. Surface water reacts with copper-bearing minerals to precipitate these carbonates and silicates, often in stalactitic or botryoidal forms.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular collector's specimen. Historically used as a minor copper ore.

Geological facts

Malachite was used as a cosmetic pigment in ancient Egypt for eye shadow. When intergrown with Chrysocolla, the resulting stone is often called 'Eilat Stone' if sourced from Israel, though commonly found in the Congo and Arizona.

Field identification & locations

Identify by the distinctive 'eye-like' banding of green Malachite interspersed with the bright blue of Chrysocolla. Found near copper mines in DR Congo, Namibia, and the Southwestern USA. Collectors should watch for synthetic imitations made of resin or ceramic.