metamorphic
Mica schist
Mica-rich schist, composed chiefly of muscovite and/or biotite with quartz; exact minerals cannot be confirmed from the image
AI-generated identification · may be incorrectGolden-brown, strongly foliated and sparkly, with flaky mica and a satiny to pearly luster. Mica hardness is about 2–3 Mohs and quartz about 7; the rock splits along its foliation rather than showing a single crystal structure.
Identified More metamorphic →
Explore Mica schist in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Golden-brown, strongly foliated and sparkly, with flaky mica and a satiny to pearly luster. Mica hardness is about 2–3 Mohs and quartz about 7; the rock splits along its foliation rather than showing a single crystal structure.
Formation & geological history
Forms when clay-rich sedimentary rock or other protolith is metamorphosed under directed pressure and heat, aligning mica into visible layers. Its age cannot be determined from appearance alone; mica schists occur in metamorphic terrains of many ages.
Uses & applications
Used mainly as a decorative or collecting stone; some schist is used locally as building or landscaping stone, though its foliation can make it prone to splitting.
Geological facts
The glitter comes from reflective mica flakes aligned in the rock’s fabric.
Field identification & locations
Look for abundant visible mica, a glittery surface, and wavy or parallel foliation. Similar-looking rocks may contain chlorite or other minerals, so identification of this hand specimen is provisional; schists occur worldwide in metamorphic mountain belts.
More like this
