metamorphic

Foliated metamorphic rock (likely mica schist)

Mica schist, probably quartz–muscovite/biotite schist; exact identification requires close inspection

AI-generated identification · may be incorrect

Gray-brown with golden, flaky reflective layers and pronounced foliation. Likely Mohs hardness 2–3 for mica and about 7 for quartz; schistose texture, with no obvious cleavage through the whole rock.

Identified September 29, 2026More metamorphic →

Explore Foliated metamorphic rock (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 or volcanic material was buried and recrystallized under heat and directed pressure. Its age cannot be determined from the image; schists occur in metamorphic belts of many geological ages.

Uses & applications

Used locally as decorative stone, landscaping material, and occasionally building stone; attractive mica-rich pieces may be collected as specimens.

Geological facts

The glittering golden sheen is consistent with mica flakes aligned along foliation, though iron-oxide staining could also contribute to the color.

Field identification & locations

Look for visible platy minerals and wavy, parallel layers that split along foliation; common in mountain belts and ancient continental rocks. A hand lens can help distinguish mica from other shiny minerals.