mineral
Turquoise in Matrix
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
AI-generated identification · may be incorrectHardness (Mohs): 5-6, Color: sky-blue to green, Luster: waxy to subvitreous, Crystal: triclinic (usually microcrystalline), Specific Gravity: 2.6-2.9
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Physical properties
Hardness (Mohs): 5-6, Color: sky-blue to green, Luster: waxy to subvitreous, Crystal: triclinic (usually microcrystalline), Specific Gravity: 2.6-2.9
Formation & geological history
Secondary mineral formed by the percolation of acidic aqueous solutions during the weathering and oxidation of pre-existing minerals; often found in arid climates within volcanic rocks or limestones.
Uses & applications
Primarily used as a gemstone for jewelry, ornamental carvings, and talismans. Highly valued by collectors for unique matrix patterns.
Geological facts
One of the oldest known gemstones, used by Ancient Egyptians and Native Americans for over 2,000 years. The matrix (dark veins) is typically composed of iron oxides or host rock like limonite.
Field identification & locations
Identify by its characteristic robin-egg blue or green color and dark dendritic matrix. Common in the Southwestern US (Arizona, Nevada) and Iran. Watch for 'stabilized' or dyed fakes.
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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
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
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Granite
Granite (Phaneritic intrusive igneous rock)
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