metamorphic
Muscovite Mica Schist
Muscovite-rich schist
AI-generated identification · may be incorrectHardness 2-2.5 on Mohs scale, silver-gray to brown color, pearly to metallic luster, foliated crystal structure with perfect basal cleavage, and specific gravity around 2.8-3.0.
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Physical properties
Hardness 2-2.5 on Mohs scale, silver-gray to brown color, pearly to metallic luster, foliated crystal structure with perfect basal cleavage, and specific gravity around 2.8-3.0.
Formation & geological history
Formed through the regional metamorphism of argillaceous sedimentary rocks like shales and mudstones under elevated heat and pressure.
Uses & applications
Used in electrical insulators, drywall joint compounds, paint fillers, and as a raw source for sheet mica.
Geological facts
Mica schists display a strong shiny foliation called schistosity due to the parallel alignment of platy mica minerals.
Field identification & locations
Easily identified in the field by its distinct flaky, glittering layers that easily peel into thin sheets.
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