mineral

Likely tumbled turquoise

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

AI-generated identification · may be incorrect

Opaque blue-green pebble with a smooth, possibly polished surface. Turquoise is typically Mohs 5–6, waxy to dull in luster, and microcrystalline; the image is too small to confirm identifying matrix or natural color.

Identified October 15, 2026More mineral →

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Physical properties

Formation & geological history

Forms in the oxidation zones of copper deposits, commonly in arid climates, when phosphate-bearing water alters aluminum-rich rock. Turquoise deposits are known in the southwestern United States, including the broader California region; the exact age cannot be determined from the photo.

Uses & applications

Used in jewelry, beads, inlay, and decorative carvings; also collected as a mineral specimen.

Geological facts

Turquoise’s blue color comes mainly from copper, while iron can contribute green tones. Many commercial pieces are stabilized or dyed, which cannot be determined visually here.

Field identification & locations

The color and rounded, smooth form suggest a tumbled stone, but other blue-green minerals or dyed material can look similar. A hardness test or close inspection for matrix and color concentration would help; the location is broadly plausible but not diagnostic.