metamorphic
Mica Schist
Mica Schist (primarily composed of Muscovite/Biotite)
Hardness: 2-4 (Mohs); Color: Silver, grey, or black; Luster: Pearly to metallic (highly reflective); Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific Gravity: 2.8-3.0
- Hardness
- 2-4 (Mohs)
- Color
- Silver, grey, or black
- Luster
- Pearly to metallic (highly reflective)
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 2-4 (Mohs); Color: Silver, grey, or black; Luster: Pearly to metallic (highly reflective); Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific Gravity: 2.8-3.0
Formation & geological history
Formed through the regional metamorphism of shale or clay-rich sedimentary rocks under medium pressure and temperature. Primarily found in metamorphic belts of mountain ranges.
Uses & applications
Used as an ornamental stone, in the production of filler materials, sometimes for building facades, used in ground form as a lubricant or in paint/cosmetics for shimmer.
Geological facts
The term 'Schist' comes from the Greek word 'schistos', meaning 'split', referring to the stone's ability to be easily split into thin plates. It represents a higher metamorphic grade than phyllite.
Field identification & locations
Identify by its 'schistosity' - a layered, foliated structure with clearly visible mica flakes that glitter in the light. Found worldwide in metamorphic terrains like the Appalachians or Alps.
More like this
