metamorphic

Mica-rich schist

Mica schist, likely muscovite–biotite schist with quartz and feldspar

AI-generated identification · may be incorrect

Gray, coarse-grained, and strongly foliated, with glittering mica flakes and an uneven, platy break. Mica has Mohs hardness 2–3; quartz and feldspar are about 6–7. The image does not allow reliable identification of individual minerals or specific gravity.

Identified October 14, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed when clay-rich sediment or similar rock was buried and metamorphosed under heat and pressure, causing mica to align into foliation. Its age and exact metamorphic conditions cannot be determined from the photograph.

Uses & applications

Schist is used locally as decorative or building stone and is collected for its visible texture; mica-bearing varieties have limited industrial use.

Geological facts

The parallel mica flakes create schistosity, a characteristic metamorphic fabric that can make the rock split along wavy surfaces.

Field identification & locations

Look for shiny, aligned mica flakes and a coarse, foliated texture; distinguish it from gneiss by its mica-rich, flaky appearance rather than distinct light-and-dark bands. Schists occur in metamorphic mountain belts worldwide.