mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
AI-generated identification · may be incorrectMohs hardness 5 to 6, sky blue to green color, waxy to subvitreous luster, triclinic crystal system, specific gravity 2.6 to 2.9.
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Physical properties
Mohs hardness 5 to 6, sky blue to green color, waxy to subvitreous luster, triclinic crystal system, specific gravity 2.6 to 2.9.
Formation & geological history
Formed by aqueous solutions percolating through aluminum-bearing rocks during arid climate weathering.
Uses & applications
Widely used in jewelry making, ornamental carvings, and bead bracelets.
Geological facts
Turquoise is one of the world's most ancient gem materials, historically prized by ancient Egyptians and Native Americans.
Field identification & locations
Identified by its distinctive robin's egg blue color and dark webbed matrix; commonly found in arid mining regions like the southwestern USA and Iran.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous