gemstone

Blue-green cabochon pendant, likely turquoise or composite turquoise

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

AI-generated identification · may be incorrect

The visible inset appears opaque blue-green with possible dark matrix, set in metal jewelry. Turquoise has Mohs hardness 5–6, waxy to subvitreous luster, cryptocrystalline structure, and no obvious cleavage.

Identified September 4, 2026More gemstone →

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At a glance

Common name: Blue-green cabochon pendant, likely turquoise or composite turquoise
Scientific name: Turquoise: hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification is uncertain from the blurred image
Category: gemstone
Identified: September 4, 2026
Method: Standard

AI Estimated Value

Approximately $10–$75 for common assembled jewelry; $100–$1,000+ if confirmed natural, high-grade turquoise with quality workmanship.

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

Turquoise forms as a secondary mineral in arid, copper-rich environments through groundwater alteration, commonly in Cenozoic to older host rocks. Jewelry may also use stabilized, reconstructed, or dyed turquoise.

Uses & applications

Used primarily in jewelry and ornamental carving; high-quality natural turquoise is collectible, while stabilized or composite material is more common and less valuable.

Geological facts

Color ranges from sky blue to green depending on copper, iron, and zinc content. The blurred specimen could alternatively be dyed howlite, glass, or another blue-green stone.

Field identification & locations

Check for natural irregular matrix, an opaque body, moderate softness, and a cool stone feel; avoid scratch or chemical tests on jewelry. Major sources include Arizona, Nevada, Iran, China, and Mexico.