mineral

Polished chrysocolla cabochon

Chrysocolla, a hydrated copper silicate (approx. Cu₂H₂Si₂O₅(OH)₄·nH₂O); possibly stabilized or composite material

AI-generated identification · may be incorrect

Bright turquoise-blue with dark matrix, polished surface, and opaque to slightly translucent appearance. Chrysocolla is soft (about 2–4 Mohs), typically massive rather than visibly crystalline, and has no distinct cleavage; the photo alone cannot confirm composition or treatment.

Identified September 27, 2026More mineral →

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Physical properties

Formation & geological history

Forms as a secondary copper mineral in oxidized zones of copper deposits, commonly alongside malachite and quartz. Its age depends on the deposit; such mineralization forms through near-surface weathering over geologic time.

Uses & applications

Cut and polished for cabochons, beads, and decorative objects; copper deposits containing it are mined chiefly for copper-bearing ores.

Geological facts

The vivid blue-green color comes from copper. Chrysocolla is often stabilized with resin or combined with quartz because untreated material can be fragile.

Field identification & locations

Look for blue-green color, irregular dark matrix, and a relatively soft feel; confirm with mineral testing, since dyed materials and other copper minerals can look similar. Common sources include Arizona, Chile, Peru, and the Democratic Republic of the Congo.