gemstone

Turquoise cabochon (likely stabilized or imitation)

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

AI-generated identification · may be incorrect

Opaque blue-green, waxy to subvitreous luster, cryptocrystalline structure, Mohs hardness 5–6, specific gravity about 2.6–2.8, and no prominent cleavage. The unusually uniform vivid color and smooth appearance suggest stabilization, dyeing, or a turquoise composite; the surrounding metal is jewelry setting.

Identified August 20, 2026More gemstone →

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At a glance

Common name: Turquoise cabochon (likely stabilized or imitation)
Scientific name: Turquoise, hydrated copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O
Category: gemstone
Identified: August 20, 2026
Method: Standard

AI Estimated Value

Approximately $5–$40 for common stabilized/composite cabochons; $50–$500+ for verified natural, high-quality turquoise, depending on origin, matrix, and 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

Natural turquoise forms as a secondary phosphate mineral in arid, copper-rich weathering zones, commonly in Eocene to younger host rocks; turquoise itself has no single defining age. Major sources include Iran, the southwestern United States, China, Chile, and Egypt.

Uses & applications

Used primarily in cabochon jewelry, beads, carvings, and ornaments; lower-grade material is stabilized with resin for durability. Turquoise is not generally used in construction.

Geological facts

Turquoise was prized in ancient Egypt, Persia, and the Americas. Matrix patterns, hardness, color, and a magnified inspection help distinguish natural material from dyed howlite, plastic, or resin composites.

Field identification & locations

Field clues include opaque blue-to-green color, porous or waxy texture, variable matrix, and moderate hardness; avoid acetone, heat, and ultrasonic cleaning. A gemological test is needed for certainty.