mineral

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O)

AI-generated identification · may be incorrect

Hardness: 2.5-3.5 on Mohs scale; Color: Cyan, blue-green, or sky blue, often with brown/black matrix; Luster: Vitreous to dull; Crystal structure: Orthorhombic (usually massive); Cleavage: None; Specific gravity: 2.0-2.4.

Hardness: 2
Color: Cyan, blue-green, or sky blue, often with brown/black matrix
Luster: Vitreous to dull

Identified June 27, 2026More mineral →

Explore Chrysocolla 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

Formed in the oxidation zones of copper ore bodies. It is a secondary mineral that precipitates from silica-rich waters reacting with copper minerals like malachite or azurite.

Uses & applications

Used primarily as a minor ore of copper, as a gemstone for jewelry (cabochons), and as highly sought-after mineral specimens for collectors.

Geological facts

The name comes from the Greek words 'chrysos' (gold) and 'kolla' (glue), referring to its ancient use as a flux for soldering gold. It is often confused with turquoise but is generally softer and has a higher water content.

Field identification & locations

Identify by its characteristic blue-green color and lack of crystal faces (usually amorphous/massive). It often adheres slightly to the tongue due to its porous nature. Commonly found in Arizona (USA), Chile, and the DRC.