gemstone

Turquoise ring

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

AI-generated identification · may be incorrect

Opaque blue-green, waxy to dull luster, triclinic microcrystalline structure, Mohs hardness 5–6, and no prominent cleavage; the setting appears to contain several polished turquoise pieces or turquoise-colored inlays.

Identified September 17, 2026More gemstone →

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Physical properties

Formation & geological history

Turquoise forms in arid regions when copper-rich groundwater alters aluminum- and phosphorus-bearing host rocks, commonly during weathering over millions of years. The exact age and locality cannot be determined from the photograph.

Uses & applications

Used primarily in jewelry, ornament, and carving; lower-grade material may be stabilized with resin. Turquoise is not generally used for construction.

Geological facts

Natural turquoise often shows a darker brown or black matrix of host rock, though matrix-free material also occurs. Color can range from sky blue to green depending largely on copper, iron, and zinc content.

Field identification & locations

Field identification relies on its opaque blue-green color, relatively soft hardness, waxy appearance, and possible matrix; plastic, dyed howlite, and synthetic materials are common imitations. Major sources include Iran, the southwestern United States, China, Chile, and Mexico.