metamorphic
Weathered mica-rich schist
Mica schist, likely muscovite–quartz schist
AI-generated identification · may be incorrectTan to silvery, coarse and strongly foliated with a sparkly mica-rich surface. Likely Mohs 2–3 for mica and 7 for quartz; mica has perfect basal cleavage, while quartz has no cleavage. Exact mineralogy cannot be confirmed from the image alone.
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Physical properties
Tan to silvery, coarse and strongly foliated with a sparkly mica-rich surface. Likely Mohs 2–3 for mica and 7 for quartz; mica has perfect basal cleavage, while quartz has no cleavage. Exact mineralogy cannot be confirmed from the image alone.
Formation & geological history
Formed when clay-rich sedimentary rock was metamorphosed under heat and pressure, aligning mica into foliation. Its age and precise formation setting cannot be determined visually.
Uses & applications
Used locally as decorative or dimension stone and collected for its glittering, layered texture; mica-bearing material also has industrial uses when sufficiently pure.
Geological facts
Schist’s visible, aligned mineral grains distinguish it from finer-grained slate and phyllite.
Field identification & locations
Look for platy, reflective grains and a tendency to split along wavy foliation; common in metamorphic belts worldwide. A hand lens and hardness tests can help confirm the identification.
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