mineral

Rough turquoise

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

AI-generated identification · may be incorrect

Typically blue to green, often with brown or dark matrix; waxy to dull luster and opaque. Mohs hardness 5–6; triclinic crystal system, usually massive rather than visibly crystalline.

Identified October 16, 2026More mineral →

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Physical properties

Typically blue to green, often with brown or dark matrix; waxy to dull luster and opaque. Mohs hardness 5–6; triclinic crystal system, usually massive rather than visibly crystalline.

Formation & geological history

Forms as a secondary mineral when copper-bearing rocks weather in arid environments, commonly within fractures and cavities. Deposits occur in geologically varied, often ancient host rocks; age cannot be determined from the image.

Uses & applications

Used as a gemstone in jewelry and ornamental objects; lower-grade material may be collected as a mineral specimen.

Geological facts

Turquoise color varies with copper and iron content: copper tends to produce blue, while iron can contribute green tones.

Field identification & locations

The blue-green color and rough, opaque appearance are consistent with turquoise, but visual identification is uncertain; similar minerals and dyed materials exist. Common sources include Iran, the southwestern United States, China, and Mexico.