metamorphic
Mica Schist
Metamorphic rock dominated by muscovite or biotite
AI-generated identification · may be incorrectHardness 2-3 on Mohs scale, silvery-gray to green color, prominent sparkling micaceous luster, and pronounced foliation.
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Physical properties
Hardness 2-3 on Mohs scale, silvery-gray to green color, prominent sparkling micaceous luster, and pronounced foliation.
Formation & geological history
Formed through regional metamorphism of pelitic sedimentary rocks like shale and mudstone under high temperature and pressure.
Uses & applications
Used locally for landscaping, decorative building stone, and historically as a source of scrap mica.
Geological facts
The distinct sparkling appearance is caused by millions of reflective mica flakes aligned along planes of weakness.
Field identification & locations
Easily identified in the field by its visible foliation and glittering surfaces; found globally in mountain-building belts.
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