Muscovite is a common rock forming mineral found in igneous rocks such as granites and granitic pegmatites as well as metamorphic rocks such as schists. Like most micas, muscovite will form "books" of mica crystals from which perfect, thin sheets can be peeled. Some other micas are biotite, lepidolite, phologopite and vermiculite.
| KAl2(AlSi3O10)(OH)2 |
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| Phyllosilicate |
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| Monoclinic |
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| 2/m |
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| 2-2.5 |
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| 2.76-2.88 |
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| {001} perfect |
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| Sectile |
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| Colorless, green, brown |
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| White |
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| Vitreous, silky, pearly |
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| Transparent/translucent |
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| Micaceous |
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| Notable Localities: |
Russia; India; Ontario, Canada; Minas Gerais, Brazil |
| Uses: |
Insulation material, lubricants, fireproofing |
Specimens:
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