metamorphic
Quartz-bearing mica schist
Mica schist, likely quartz–muscovite/biotite schist
AI-generated identification · may be incorrectCoarse, foliated texture with glittering platy mica and a translucent quartz patch. Quartz and mica are about Mohs 7 and 2–3; mica gives a pearly sheen and splits into sheets. Exact composition and hardness cannot be confirmed from the image.
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Physical properties
Coarse, foliated texture with glittering platy mica and a translucent quartz patch. Quartz and mica are about Mohs 7 and 2–3; mica gives a pearly sheen and splits into sheets. Exact composition and hardness cannot be confirmed from the image.
Formation & geological history
Formed when clay-rich or other sedimentary rocks were buried and metamorphosed under heat and pressure, aligning mica into foliation. Its age is unknown and depends on the source region.
Uses & applications
Used locally as decorative or building stone; attractive pieces may be collected, though schist is generally less durable than massive stone.
Geological facts
Schistosity is the characteristic layering produced by aligned visible platy minerals.
Field identification & locations
Look for coarse, sparkly mica flakes arranged in parallel layers, often with quartz lenses or patches. Mica schists occur in metamorphic belts worldwide; confirm identification by examining a fresh surface and mineral grains.
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