metamorphic

Small banded metamorphic rock fragment

Indeterminate foliated metamorphic rock; possibly mica schist or gneiss

AI-generated identification · may be incorrect

Gray-brown with visible light and dark bands or foliation and a rough, granular surface. Hardness and mineral composition cannot be reliably determined from the image; likely quartz and feldspar with dark mica or other mafic minerals.

Identified September 27, 2026More metamorphic →

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Physical properties

Formation & geological history

Likely formed when pre-existing rock was altered by heat and pressure, producing mineral alignment or banding. Its geological age and precise formation setting cannot be identified from the photograph.

Uses & applications

A fragment this small has no evident industrial or construction use; it may be kept as a field specimen or curiosity.

Geological facts

Alternating light and dark mineral bands are common in metamorphic rocks, but weathering and the small size make identification uncertain.

Field identification & locations

Look for persistent mineral layers and a crystalline, interlocking texture; a fresh surface or simple hardness tests would help distinguish schist from gneiss. Similar rocks occur in metamorphic terrains worldwide.