metamorphic

Pale-green schist fragment

Chlorite–sericite schist, possibly containing epidote or actinolite

AI-generated identification · may be incorrect

Fine-grained, foliated metamorphic rock with pale green and whitish bands; likely silky to dull luster and irregular cleavage along foliation. Estimated hardness 2–4 Mohs; exact mineralogy requires testing.

Identified September 2, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed when a clay-rich or volcanic protolith underwent low- to medium-grade regional metamorphism, commonly during mountain building. Geological age is indeterminate from the image.

Uses & applications

Used locally as decorative stone, landscaping material, or educational specimens; this small fragment has negligible commercial value unless laboratory-confirmed as a rarer green mineral.

Geological facts

The platy, layered texture is characteristic of schistosity, produced by aligned sheet silicates such as chlorite, mica, or talc. Green coloration commonly indicates chlorite, epidote, actinolite, or serpentine.

Field identification & locations

Common in metamorphic mountain belts worldwide, including the Alps, Appalachians, and western North America. Identify by visible foliation, softness, and flaky breakage; a streak, hardness, acid, and thin-section test can distinguish it from serpentine or slate.