mineral

Chrysocolla

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

Hardness: 2.5-3.5 (can reach 7 if silicated); Color: cyan, turquoise-blue, or green; Luster: vitreous to earthy; Crystal Structure: Amorphous or Orthorhombic; Specific Gravity: 2.0-2.4.

Hardness: 2
Color: cyan, turquoise-blue, or green
Luster: vitreous to earthy

Identified March 15, 2026More mineral →

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Physical properties

Hardness: 2.5-3.5 (can reach 7 if silicated); Color: cyan, turquoise-blue, or green; Luster: vitreous to earthy; Crystal Structure: Amorphous or Orthorhombic; Specific Gravity: 2.0-2.4.

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 often found with malachite and azurite.

Uses & applications

Predominantly used as a minor copper ore, for ornamental carvings, and in lapidary work for jewelry cabochons.

Geological facts

Its name comes from the Greek '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.

Field identification & locations

Identify by its vivid blue-green color and its 'stick-to-the-tongue' property due to its high porosity. Commonly found in copper-rich regions like Arizona (USA), Chile, DRC, and Israel.

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