mineral
Likely weathered stone or mineral fragment
Unidentified fine-grained silicate rock; possible basalt, greenstone, or serpentine
AI-generated identification · may be incorrectSmall rounded, olive-gray specimen with a dull to slightly earthy luster and no visible crystal faces. Hardness and cleavage cannot be determined reliably from the image; likely specific gravity around 2.6–3.3 if silicate-based.
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Physical properties
Small rounded, olive-gray specimen with a dull to slightly earthy luster and no visible crystal faces. Hardness and cleavage cannot be determined reliably from the image; likely specific gravity around 2.6–3.3 if silicate-based.
Formation & geological history
Probably a naturally weathered and water-rounded fragment of volcanic or metamorphic rock. Its geological age and formation environment cannot be established without testing or locality information.
Uses & applications
No specific industrial or jewelry use can be assigned from the photograph; it is mainly suitable as a curiosity or teaching specimen unless identified more precisely.
Geological facts
The green-gray color may reflect chlorite, epidote, or serpentine minerals, but lighting and surface weathering can produce similar colors in many rocks.
Field identification & locations
Common possibilities include basalt, greenstone, and serpentine from river gravels or eroded outcrops. Check for a streak, magnetism, translucency, acid reaction, and hardness; a fresh broken surface and locality are especially useful for identification.
