mineral
Muscovite
KAl2(AlSi3O10)(OH)2
AI-generated identification · may be incorrectHardness is 2-2.5 on the Mohs scale, color ranges from colorless to yellow, brown, or green, and it exhibits a vitreous to pearly luster with perfect basal cleavage.
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Physical properties
Hardness is 2-2.5 on the Mohs scale, color ranges from colorless to yellow, brown, or green, and it exhibits a vitreous to pearly luster with perfect basal cleavage.
Formation & geological history
Forms in igneous rocks like pegmatites, as well as metamorphic rocks like schists and gneisses, through crystallization from cooling magmas or hydrothermal activity.
Uses & applications
Used in electrical insulators, paints, plastics, cosmetics for its pearlescent sheen, and as a collectible mineral specimen.
Geological facts
Muscovite is the most common member of the mica family and was historically used as a glass substitute in windows, known as muscovy glass.
Field identification & locations
Easily identified by its ability to split into extremely thin, flexible, elastic sheets; found worldwide in pegmatite veins and metamorphic terranes.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Limonite
FeO(OH)•nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Feldspar
Feldspar Group (Tectosilicate, e.g., KAlSi3O8)
mineral