mineral

Tumbled blue-green stone, likely chrysocolla-bearing material

Chrysocolla, hydrated copper phyllosilicate: approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; identification is provisional from the photograph

AI-generated identification · may be incorrect

Blue-green, mottled, and waxy to vitreous with no visible crystal faces; chrysocolla has Mohs hardness about 2.5–3.5 and low-to-moderate specific gravity (~2.0–2.4). The rounded shape indicates tumbling or polishing, and darker areas may contain copper minerals or matrix.

Identified August 20, 2026More mineral →

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At a glance

Common name: Tumbled blue-green stone, likely chrysocolla-bearing material
Scientific name: Chrysocolla, hydrated copper phyllosilicate: approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; identification is provisional from the photograph
Category: mineral
Identified: August 20, 2026
Method: Standard

AI Estimated Value

Typically $3–$15 for a small tumbled piece; attractive polished or lapidary-grade specimens may sell for $20–$100.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Forms as a secondary copper mineral in oxidized zones of copper deposits, commonly replacing or coating host rock; ages vary from recent weathering to ancient ore formation.

Uses & applications

Primarily collected as a decorative lapidary stone, cabochon, or tumbled specimen; softer material is generally unsuitable for durable jewelry and has little industrial use.

Geological facts

Often confused with turquoise, chrysocolla-malachite, or dyed stones. Copper-rich coloration and a soft, waxy appearance are characteristic, but laboratory testing is needed for confirmation.

Field identification & locations

Common localities include Arizona, New Mexico, Nevada, Chile, Peru, the Democratic Republic of Congo, and Israel. A streak, hardness, specific-gravity, or Raman/XRF test can distinguish it from turquoise and glass.