metamorphic

Likely garnet-bearing schist

Garnet mica schist; commonly quartz + mica (muscovite/biotite) ± garnet

AI-generated identification · may be incorrect

Dark gray, visibly foliated, sparkly schistose fabric; the red markings appear to be paint, not mineral color. Mica has Mohs hardness ~2–3; quartz ~7 and garnet ~6.5–7.5; exact composition cannot be confirmed from the photo.

Identified September 30, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed when clay-rich sedimentary rock was buried and metamorphosed under heat and pressure, producing aligned mica and possibly garnet. Its age and metamorphic conditions cannot be determined visually.

Uses & applications

Schist is used locally as decorative or facing stone and is collected for its foliation and minerals; mica and garnet may have separate industrial or gem uses when concentrated and suitable.

Geological facts

The platy, glittering surface reflects aligned mica grains, a key feature of schist. Red paint obscures possible mineral details.

Field identification & locations

Look for flaky, aligned mica layers and possible hard, reddish garnet grains; a hand lens and fresh surface would help verify the identification. Schists occur in metamorphic belts worldwide.