metamorphic

Likely mica schist

Mica-rich schist, likely quartz–muscovite/biotite schist

AI-generated identification · may be incorrect

Coarse, sparkly silver-white and dark gray-brown surface suggests mica with quartz and darker minerals. Mica is Mohs 2–3 and quartz 7; the image does not clearly show foliation, so identification is approximate.

Identified October 6, 2026More metamorphic →

Explore Likely mica schist in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed when clay-rich sedimentary rock was altered by heat and pressure, aligning mica minerals into a foliated texture. Its age cannot be determined from appearance alone; schists occur in many ancient metamorphic terrains.

Uses & applications

Schist is used as decorative building stone, landscaping rock, and a collector specimen; mica has industrial uses in insulation and fillers.

Geological facts

The glitter comes from reflective mica flakes, which split into thin sheets; quartz grains commonly make the rock harder and more resistant to weathering.

Field identification & locations

Check for platy, aligned mica flakes and a tendency to split along foliation; common in metamorphic mountain belts worldwide. The specimen’s exact composition needs closer inspection or testing.