metamorphic
Mica schist (likely muscovite schist)
Muscovite–quartz–feldspar schist; chiefly muscovite mica, quartz, and feldspar
AI-generated identification · may be incorrectTypically silvery, pinkish, or bronze with a sparkly micaceous luster and strongly foliated, platy texture; muscovite hardness is 2–2.5, while quartz is 7. Crystals show perfect basal cleavage and split into thin flexible sheets; the specimen appears weathered and iron-stained.
Identified More metamorphic →
Explore Mica schist (likely muscovite schist) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Typically silvery, pinkish, or bronze with a sparkly micaceous luster and strongly foliated, platy texture; muscovite hardness is 2–2.5, while quartz is 7. Crystals show perfect basal cleavage and split into thin flexible sheets; the specimen appears weathered and iron-stained.
Formation & geological history
Formed when shale or other clay-rich sediment was regionally metamorphosed under directed pressure and moderate temperature, commonly during mountain building. Exact age cannot be determined from an image; schists range from Precambrian to younger Phanerozoic rocks.
Uses & applications
Used locally as decorative stone, fill, and aggregate, but strongly foliated material has limited construction value. Attractive pieces are collected as mineral specimens; mica may have industrial electrical and thermal applications.
Geological facts
The glitter comes from aligned mica flakes reflecting light, producing schistosity. Pink or rusty tones commonly reflect feldspar and oxidation of iron-bearing minerals.
Field identification & locations
Identify it by abundant visible, aligned mica flakes, easy splitting along foliation, and a glittery surface; distinguish it from phyllite by its larger, more visible crystals. Common in regional metamorphic belts worldwide, including the Appalachians, Alps, Himalaya, and Scandinavian mountains.
More like this
