mineral
Muscovite
Muscovite Mica (KAl2(AlSi3O10)(F,OH)2)
AI-generated identification · may be incorrectHardness 2-2.5 on the Mohs scale, colorless to silvery-white or pale brown, pearly to vitreous luster, monoclinic crystal system, exhibits perfect basal cleavage.
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Physical properties
Hardness 2-2.5 on the Mohs scale, colorless to silvery-white or pale brown, pearly to vitreous luster, monoclinic crystal system, exhibits perfect basal cleavage.
Formation & geological history
Forms in igneous rocks like granites and pegmatites, as well as metamorphic rocks like schists and gneisses through regional metamorphism.
Uses & applications
Used in electronics as an insulator, in paints, plastics, cosmetics for pearlescent sheen, and by collectors.
Geological facts
Muscovite is the most common mineral 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, and elastic sheets with a shiny, pearly reflection; found worldwide in pegmatite veins.
