gemstone
Turquoise
CuAl6(PO4)4(OH)8·4H2O
AI-generated identification · may be incorrectMohs hardness of 5-6, robin's egg blue to greenish-blue color, waxy to subvitreous luster, triclinic crystal system, poor cleavage, specific gravity of 2.6-2.9.
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Physical properties
Mohs hardness of 5-6, robin's egg blue to greenish-blue color, waxy to subvitreous luster, triclinic crystal system, poor cleavage, specific gravity of 2.6-2.9.
Formation & geological history
Forms by the action of meteoric waters percolating through copper-bearing rocks during ancient weathering and oxidation processes in arid environments.
Uses & applications
Widely used in jewelry making, ornamental carvings, beadwork, and inlay designs.
Geological facts
Turquoise is one of the world's most ancient gem materials, prized by ancient civilizations including the Egyptians and Native Americans.
Field identification & locations
Identified by its distinctive blue-green color and dark webbing matrix; commonly found in arid regions like the southwestern United States, Iran, and China.
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