gemstone

Likely turquoise

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

AI-generated identification · may be incorrect

Blue-green, opaque material with a polished cabochon-like surface; turquoise is typically Mohs 5–6, waxy to subvitreous, and triclinic. The image is too indistinct to confirm the stone or assess matrix and treatments.

Identified October 3, 2026More gemstone →

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Physical properties

Formation & geological history

Forms as a secondary mineral in arid-zone copper deposits, where phosphate-bearing water alters aluminum-rich rock; deposits range from geologically recent to hundreds of millions of years old.

Uses & applications

Used in jewelry, ornamental objects, and collections; lower-grade material is also used for beads and inlay.

Geological facts

Turquoise color comes mainly from copper, while iron can shift it toward green; many commercial pieces are stabilized or dyed.

Field identification & locations

Look for an opaque blue-to-green color, often with dark host-rock matrix; notable sources include Iran, the southwestern United States, and China. A photo alone cannot reliably distinguish turquoise from dyed stone or imitation.