mineral

Blue-green turquoise-like tumbled stone

Turquoise, hydrous copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

AI-generated identification · may be incorrect

Appears opaque blue-green with a matte-to-waxy luster and rounded, polished edges. Turquoise has Mohs hardness 5–6, cryptocrystalline structure, no prominent cleavage, and specific gravity about 2.6–2.9; the blurred image prevents confident confirmation.

Identified August 11, 2026More mineral →

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At a glance

Common name: Blue-green turquoise-like tumbled stone
Scientific name: Turquoise, hydrous copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O
Category: mineral
Identified: August 11, 2026
Method: Standard

AI Estimated Value

Approximately $2–$20 for a small common or treated piece; $25–$200+ for attractive natural turquoise, depending on color, matrix, locality, and craftsmanship.

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 regions when copper-rich groundwater alters aluminum- and phosphorus-bearing rocks, commonly in fractures and breccias. Deposits are generally geologically young relative to their host rocks, often associated with weathering zones.

Uses & applications

Used as a gemstone in cabochons, beads, carvings, and jewelry; lower-grade material is used for ornamental objects and occasionally stabilized or reconstituted products.

Geological facts

Natural turquoise commonly shows brown or black limonite/iron-manganese matrix, though none is clearly visible here. Similar blue-green materials include dyed howlite, chrysocolla, amazonite, and glass.

Field identification & locations

Common localities include Iran, Arizona and Nevada, China, Mexico, Chile, and Egypt. Field tests include checking for opaque color, waxy luster, hardness, and matrix; avoid destructive tests because treated imitations are common.