gemstone

Turquoise (small irregular fragment)

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

AI-generated identification · may be incorrect

The bright blue-green color and opaque appearance are consistent with turquoise, though the tiny fragment cannot be identified with certainty from the photo. Turquoise is typically Mohs 5–6, waxy to subvitreous, and triclinic; matrix or treatments may affect its appearance.

Identified October 13, 2026More gemstone →

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Physical properties

Formation & geological history

Forms as a secondary mineral when copper-bearing fluids alter aluminum- and phosphate-rich rocks, commonly in arid-zone deposits. Deposits range from ancient to geologically recent; the image does not establish the specimen’s age or source.

Uses & applications

Used in jewelry, beads, inlay, and decorative objects; lower-grade material may be stabilized or treated for durability.

Geological facts

Not a rock type but a hydrated phosphate mineral; natural turquoise often occurs with brown or dark host-rock matrix.

Field identification & locations

Common sources include the southwestern United States, Iran, China, and Mexico. Field clues include opaque blue-green color and a waxy feel; verify with mineral testing because dyed imitations are common.