mineral
Turquoise
Copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O
AI-generated identification · may be incorrectHardness 5-6 on Mohs scale, characteristic robin's egg blue to green color, waxy to sub-vitreous luster, triclinic crystal system.
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Physical properties
Hardness 5-6 on Mohs scale, characteristic robin's egg blue to green color, waxy to sub-vitreous luster, triclinic crystal system.
Formation & geological history
Formed by the weathering and oxidation of pre-existing copper-bearing minerals in arid climates.
Uses & applications
Extensively used as a gemstone in jewelry, inlay work, and decorative carvings.
Geological facts
Turquoise is one of the oldest gemstones in history, prized by ancient civilizations including the Egyptians and Native Americans.
Field identification & locations
Easily identified by its distinct blue-green color and dark web-like matrix veins; found primarily in the southwestern USA, Iran, and China.
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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