mineral

Blue-green mineral specimen, likely chrysocolla or turquoise

Chrysocolla: hydrated copper phyllosilicate, approximately Cu₂H₂O₅Si; Turquoise: CuAl₆(PO₄)₄(OH)₈·4H₂O

AI-generated identification · may be incorrect

The blue-green, opaque, irregular specimen has a waxy to dull luster and no visible crystal faces; likely hardness is about 2.5–4.5 for chrysocolla or 5–6 for turquoise. The surrounding white patterned object appears to be a decorative ceramic/plaster base, not geological material.

Identified August 15, 2026More mineral →

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At a glance

Common name: Blue-green mineral specimen, likely chrysocolla or turquoise
Scientific name: Chrysocolla: hydrated copper phyllosilicate, approximately Cu₂H₂O₅Si; Turquoise: CuAl₆(PO₄)₄(OH)₈·4H₂O
Category: mineral
Identified: August 15, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a small common rough specimen; attractive turquoise or chrysocolla specimens may range from $30–$150+, depending on quality and authenticity.

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

Copper-bearing minerals form these secondary deposits through groundwater alteration near oxidized copper ores, generally in arid environments. Formation ages vary widely and cannot be determined from the photograph.

Uses & applications

Turquoise is used in jewelry and carvings; chrysocolla is mainly collected as a cabinet specimen and occasionally used for ornamental stone. The pictured piece has little construction or industrial use.

Geological facts

Chrysocolla commonly occurs with malachite, azurite, and quartz, while turquoise may show a distinctive dark spiderweb matrix. Color overlap makes visual identification alone unreliable.

Field identification & locations

Test hardness on an inconspicuous area, inspect streak and matrix, and use copper/phosphate testing or laboratory analysis for confirmation. Common localities include Arizona, Nevada, Mexico, Chile, Peru, and Australia.