mineral
Raw turquoise
Turquoise, hydrated copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O
AI-generated identification · may be incorrectOpaque blue-green, with a waxy to dull luster; hardness about 5–6 Mohs and triclinic crystal structure. The rough, irregular piece appears consistent with turquoise, though an image alone cannot confirm its identity or treatments.
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Physical properties
Opaque blue-green, with a waxy to dull luster; hardness about 5–6 Mohs and triclinic crystal structure. The rough, irregular piece appears consistent with turquoise, though an image alone cannot confirm its identity or treatments.
Formation & geological history
Forms as a secondary mineral when copper-bearing rocks weather in arid environments, commonly in veins and nodules. Deposits occur across a range of geological ages.
Uses & applications
Used for beads, cabochons, and decorative objects; it is also collected as a mineral specimen.
Geological facts
Its blue-to-green color comes chiefly from copper, while iron may contribute green tones.
Field identification & locations
Look for opaque blue-green color and a relatively soft, often veined or mottled surface; common sources include the southwestern United States, Iran, and China. Avoid scratch or chemical tests on a potentially valuable specimen.
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