metamorphic
Mica Schist
Metamorphic Schist (Quartz-Muscovite-Biotite)
AI-generated identification · may be incorrectHardness varies from 2 to 4 on the Mohs scale depending on mineral content. Features prominent silvery or dark flaky mica sheets displaying a shiny, pearly luster and planar foliation.
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Physical properties
Hardness varies from 2 to 4 on the Mohs scale depending on mineral content. Features prominent silvery or dark flaky mica sheets displaying a shiny, pearly luster and planar foliation.
Formation & geological history
Formed through regional metamorphism of pelitic sedimentary rocks like shale or mudstone under high temperature and pressure over millions of years.
Uses & applications
Used primarily in introductory geology education, ornamental landscaping, and occasionally as a source of industrial mica flakes.
Geological facts
Schist is characterized by its visible mineral grains and tendency to split into thin, irregular flakes along planes called schistosity.
Field identification & locations
Identify in the field by its distinct sparkling appearance due to abundant reflective mica flakes and visible foliation. Commonly found in ancient mountain belts and regional metamorphic terranes.
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