mineral

Chrysocolla (in Host Rock)

Hydrated copper silicate - Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

Hardness: 2.5-3.5 (often harder when silicified); Color: Cyan, teal, or blue-green; Luster: Vitreous to dull; Crystal structure: Orthorhombic (rarely crystallized, usually amorphous/massive); Specific gravity: 2.0-2.4.

Hardness: 2
Color: Cyan, teal, or blue-green
Luster: Vitreous to dull

Identified June 28, 2026More mineral →

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Physical properties

Formation & geological history

Formed in the oxidation zones of copper ore bodies where copper-bearing solutions react with silica-rich water. It is a secondary mineral usually found in arid regions.

Uses & applications

Primarily used as a minor ore of copper, as a gemstone for jewelry (cabochons), and as a popular mineral specimen for collectors.

Geological facts

Chrysocolla has been known since ancient times; its name comes from the Greek words 'chrysos' (gold) and 'kolla' (glue), referring to its use as a soldering agent for gold. It is often confused with turquoise or malachite.

Field identification & locations

Identify by its bright blue-green color and its tendency to stick to the tongue due to its porous nature. Commonly found in Arizona (USA), Chile, DRC, and Israel. Look for it near copper mines alongside malachite and azurite.

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metamorphic

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

Mineral

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Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

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