mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
AI-generated identification · may be incorrectMohs hardness of 5-6, distinctive robin's egg blue to greenish-blue 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 greenish-blue color, waxy to sub-vitreous luster, and triclinic crystal system.
Formation & geological history
Forms by the action of meteoric waters percolating through copper-bearing aluminum rocks in arid climates.
Uses & applications
Extensively used in jewelry, ornamental carvings, and inlay work.
Geological facts
Turquoise is one of the oldest gemstones in history, prized by ancient civilizations like the Egyptians and Native Americans.
Field identification & locations
Identified by its signature blue color and soft waxy texture; commonly mined in the southwestern United States, Iran, and China.
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Gneiss or Mica Schist with Garnet
Metamorphic
Limonite
FeO(OH)•nH2O
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Limonite
FeO(OH)•nH2O
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Limonite
FeO(OH)•nH2O
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Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous