metamorphic
Mica Schist
Metamorphic Schist
AI-generated identification · may be incorrectHardness 3-4 on Mohs scale, silvery-gray to greenish color, pearly to metallic luster, foliated crystal structure with visible planar alignment, excellent cleavage, specific gravity around 2.7-2.9.
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Physical properties
Hardness 3-4 on Mohs scale, silvery-gray to greenish color, pearly to metallic luster, foliated crystal structure with visible planar alignment, excellent cleavage, specific gravity around 2.7-2.9.
Formation & geological history
Formed through regional metamorphism of pelitic sedimentary rocks like shale or mudstone under high temperature and pressure.
Uses & applications
Used as a decorative aggregate, in construction materials, and as a source of mica for industrial electrical insulation.
Geological facts
Mica schist features prominent foliation known as schistosity, where platy minerals like muscovite align perpendicular to tectonic pressure.
Field identification & locations
Easily identified in the field by its sparkling, flaky appearance due to abundant mica flakes; common in mountain-building belts worldwide.
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