gemstone

Blue-green tumbled gemstone, likely turquoise or dyed turquoise

Turquoise: hydrated copper–aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; identification is uncertain from the blurry image

AI-generated identification · may be incorrect

Opaque blue-green, waxy to subvitreous luster, commonly massive rather than visibly crystalline; Mohs hardness 5–6, specific gravity about 2.6–2.9, with indistinct cleavage. The rounded, polished form may be stabilized, dyed, or a turquoise imitation.

Identified August 16, 2026More gemstone →

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At a glance

Common name: Blue-green tumbled gemstone, likely turquoise or dyed turquoise
Scientific name: Turquoise: hydrated copper–aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; identification is uncertain from the blurry image
Category: gemstone
Identified: August 16, 2026
Method: Standard

AI Estimated Value

Approximately $1–$30 if dyed or imitation; $5–$100 for common genuine stabilized turquoise; $50–$500+ for quality natural turquoise.

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

Natural turquoise forms in arid-region, near-surface hydrothermal or weathering zones where copper-bearing fluids react with aluminum- and phosphate-rich rock; deposits are generally Cenozoic to older. Common sources include Iran, the U.S. Southwest, China, Egypt, and Chile.

Uses & applications

Used for cabochons, beads, carvings, and jewelry; lower-grade material is often stabilized with resin. If genuine and attractive, value ranges from about $5–$30 for a small common tumbled piece to $50–$500+ for high-grade natural material.

Geological facts

The intense blue-green color comes mainly from copper; iron commonly shifts it toward green. Similar-looking materials include chrysocolla, dyed howlite or magnesite, glass, and synthetic turquoise.

Field identification & locations

Check for opaque color, waxy luster, natural matrix, moderate hardness, and a warm—not glassy—appearance; avoid relying on color alone. A gemological test for composition, dye, resin, and specific gravity is needed for confident identification.