mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
AI-generated identification · may be incorrectMohs hardness of 5-6, distinctive robin's egg blue to green color, waxy to sub-vitreous luster, and triclinic crystal system.
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Physical properties
Mohs hardness of 5-6, distinctive robin's egg blue to green color, waxy to sub-vitreous luster, and triclinic crystal system.
Formation & geological history
Forms by the chemical action of percolating acidic aqueous solutions during the weathering and oxidation of pre-existing copper minerals and aluminum-bearing rocks.
Uses & applications
Widely used as a gemstone in jewelry, inlay work, and ornamental carvings.
Geological facts
Turquoise is one of the oldest gemstones in history, prized by ancient civilizations including the Egyptians and Native Americans for amulets and ceremonial items.
Field identification & locations
Identified by its signature bright blue color, often featuring dark web-like matrix veins. Commonly mined in the southwestern United States, Iran, and China.
