mineral

Tumbled turquoise-bearing stone (likely turquoise or chrysocolla)

Turquoise: CuAl₆(PO₄)₄(OH)₈·4H₂O; possible chrysocolla: hydrated copper silicate

AI-generated identification · may be incorrect

Small polished/tumbled specimen with blue-green color and gray-brown matrix; typically waxy to dull luster, cryptocrystalline structure, no visible cleavage, and Mohs hardness about 2–6 (turquoise ~5–6; chrysocolla ~2–4).

Identified September 6, 2026More mineral →

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At a glance

Common name: Tumbled turquoise-bearing stone (likely turquoise or chrysocolla)
Scientific name: Turquoise: CuAl₆(PO₄)₄(OH)₈·4H₂O; possible chrysocolla: hydrated copper silicate
Category: mineral
Identified: September 6, 2026
Method: Standard

AI Estimated Value

About $2–$20 for a small common tumbled or treated piece; natural, vivid, well-patterned turquoise may sell for $25–$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

Copper-rich groundwater alters aluminum- or silica-bearing rocks, forming turquoise or chrysocolla in veins and cavities, generally in arid regions over geologically recent to ancient weathering zones.

Uses & applications

Used as a semiprecious gemstone, beads, carvings, and decorative objects; softer material is often stabilized, dyed, or coated for durability.

Geological facts

Blue-green copper minerals can be difficult to distinguish visually, and many commercial specimens are composites or treated. A matrix pattern is common in turquoise from several deposits.

Field identification & locations

Common sources include Iran, the American Southwest, Mexico, Chile, China, and Australia. Confirm identity with hardness, specific gravity, magnification, and professional testing; avoid destructive tests on polished pieces.