metamorphic

Schist (containing Muscovite Mica and Chlorite)

Mica Schist

AI-generated identification · may be incorrect

Hardness 2.5-4, greyish-green to silvery grey, pearly to sub-metallic luster on flake surfaces, foliated texture with fine-grained visible mica flakes.

Identified July 25, 2026More metamorphic →

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Physical properties

Hardness 2.5-4, greyish-green to silvery grey, pearly to sub-metallic luster on flake surfaces, foliated texture with fine-grained visible mica flakes.

Formation & geological history

Formed through regional metamorphism of shale, mudstone, or clay-rich sedimentary rocks under medium-grade temperature and pressure conditions.

Uses & applications

Used historically as low-grade dimension stone, road fill, and aggregate. Primarily collected as geological education and mineral specimens.

Geological facts

Schist is characterized by having well-developed foliation, allowing it to easily split into thin layers or flakes due to aligned platy minerals like mica and chlorite.

Field identification & locations

Look for distinctive shiny, reflective silvery-green mica flakes aligned in parallel layers. Commonly found in metamorphic terranes, mountain ranges, and stream beds.