mineral
Muscovite
KAl2(AlSi3O10)(OH)2
AI-generated identification · may be incorrectHardness of 2 to 2.5 on the Mohs scale, pearly to vitreous luster, colorless or silvery-white sheets with perfect basal cleavage, and monoclinic crystal system.
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Physical properties
Hardness of 2 to 2.5 on the Mohs scale, pearly to vitreous luster, colorless or silvery-white sheets with perfect basal cleavage, and monoclinic crystal system.
Formation & geological history
Forms in granitic pegmatites, metamorphic rocks like schists and gneisses, and secondary weathering environments.
Uses & applications
Used in electrical insulators, paints, plastics, joint cements, and as a raw material in cosmetics for its pearly sheen.
Geological facts
Also known as common mica, historical window panes in Russia were made from large sheets of muscovite, giving rise to the name muscovy-glass.
Field identification & locations
Identified by its distinct sheet-like cleavage and flexible, elastic flakes. Found globally in pegmatites and metamorphic terrains.
