mineral

Raw turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O; likely turquoise-bearing rock with pale host matrix

AI-generated identification · may be incorrect

Hydrated copper-aluminum phosphate; typically blue-green, waxy to dull luster, cryptocrystalline, opaque, and Mohs hardness 5–6. The specimen shows pale green-blue color, brown-gray matrix, and irregular fracture; its exact identity cannot be confirmed from an image alone.

Identified September 16, 2026More mineral →

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At a glance

Common name: Raw turquoise
Scientific name: Turquoise, CuAl6(PO4)4(OH)8·4H2O; likely turquoise-bearing rock with pale host matrix
Category: mineral
Identified: September 16, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a small raw, pale matrix specimen; $30–$200+ for attractive natural, untreated turquoise, depending on locality, color, stability, and provenance.

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, oxidized zones of copper deposits when phosphate-bearing groundwater alters aluminum-rich rocks. Most turquoise is geologically young, commonly Cenozoic, though deposits may be older.

Uses & applications

Used as a gemstone, cabochon, bead, carving, and collector specimen; gem quality is commonly stabilized with resin. It has little construction or industrial use.

Geological facts

Color varies with copper, iron, and zinc content: greener material may contain more iron or zinc. Natural turquoise is porous and can darken or absorb oils, solvents, and moisture.

Field identification & locations

Common localities include Iran, the southwestern United States, China, Egypt, Chile, and Mexico. A field clue is blue-green color in a soft, opaque, veined mass associated with limonite or other matrix; avoid confusing dyed howlite or magnesite with turquoise.