mineral

Tumbled turquoise

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

AI-generated identification · may be incorrect

Typically blue to blue-green with darker brown or gray matrix, waxy to subvitreous luster, cryptocrystalline structure, no visible cleavage, Mohs hardness 5–6, and specific gravity about 2.6–2.8. The rounded surface indicates tumbling and polishing; dyeing or stabilization is also possible.

Identified September 4, 2026More mineral →

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At a glance

Common name: Tumbled turquoise
Scientific name: Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
Category: mineral
Identified: September 4, 2026
Method: Standard

AI Estimated Value

About $5–$25 for a small common tumbled or treated piece; $30–$200+ for attractive natural, untreated turquoise, with exceptional provenance commanding much more.

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 mineral in arid, copper-rich, phosphate-bearing rocks through groundwater alteration, commonly during Cenozoic weathering over older host rocks. Major deposits occur in Iran, the southwestern United States, China, Chile, and Mexico.

Uses & applications

Used for cabochons, beads, carvings, and ornamental objects; historically valued in jewelry and ceremonial art. Lower-grade material is often stabilized with resin or reconstructed from turquoise powder.

Geological facts

Natural turquoise commonly shows spiderweb matrix and can vary from sky blue to green depending on copper, iron, and zinc content. Color and porosity may be enhanced by waxing, resin, or dye.

Field identification & locations

Identify it by its opaque blue-green color, relatively soft hardness, waxy feel, and lack of crystal faces; it should not fizz in dilute acid. This image alone cannot distinguish natural, stabilized, dyed, or imitation material.