mineral

Chrysocolla on Matrix

Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O

AI-generated identification · may be incorrect

Hardness: 2.5-3.5 (often harder if high silica content); Color: Cyan, turquoise-blue, or green; Luster: Vitreous to dull/earthy; Crystal structure: Orthorhombic (acicular crystals, usually amorphous); Specific gravity: 2.0-2.4.

Hardness: 2
Color: Cyan, turquoise-blue, or green
Luster: Vitreous to dull/earthy

Identified April 8, 2026More mineral →

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Physical properties

Formation & geological history

Formed in the oxidation zones of copper ore bodies. It is a secondary mineral that precipitates from circulating groundwater containing dissolved copper reacting with silica-rich rocks.

Uses & applications

Used primarily as a minor ore of copper, as a gemstone for jewelry (cabochons and beads), and as a popular specimen for mineral collectors.

Geological facts

Chrysocolla is often confused with turquoise, but it is softer. It is frequently found intergrown with other minerals like quartz, malachite, or azurite. Historically, it was named from the Greek words 'chrysos' (gold) and 'kolla' (glue), referencing its use in soldering gold.

Field identification & locations

Identify in the field by its vivid blue-green color and tendency to stick to the tongue due to its porous, hydrated nature. Found in arid regions like Arizona (USA), Chile, Zaire, and Australia.