metamorphic

Foliated metamorphic rock, likely schist

Mica schist (likely quartz–mica schist; exact identification requires closer examination)

AI-generated identification · may be incorrect

Dark gray with visible wavy foliation and scattered reflective grains, consistent with mica and quartz. Typical mica schist has Mohs hardness about 2–7 depending on minerals, a foliated texture, and variable cleavage; its surface appears dull to subtly lustrous.

Identified October 15, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed when clay-rich sedimentary or igneous rocks were buried and recrystallized under heat and pressure, aligning mica into foliation. Its age and precise metamorphic setting cannot be determined from the image.

Uses & applications

Schist is used as decorative or landscaping stone and, where sound, as building or paving stone; attractive specimens may be collected.

Geological facts

Mica-rich layers can split along foliation, while quartz-rich bands resist splitting and create the rock’s uneven texture.

Field identification & locations

Look for aligned, flaky or glittering mica grains and wavy layers; the photographed specimen is consistent with schist but could be another foliated rock. Schists occur in metamorphic belts worldwide.