metamorphic
Greenish altered rock, possibly serpentinite or chlorite-rich schist
Tentative: serpentine-group minerals, chiefly antigorite/lizardite, or chlorite–actinolite assemblage
AI-generated identification · may be incorrectPale green-gray, opaque, dull to slightly waxy, with a rough fibrous or foliated texture; likely Mohs 2.5–4, but the blurry image prevents reliable determination of cleavage, crystal structure, or specific gravity.
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Physical properties
Pale green-gray, opaque, dull to slightly waxy, with a rough fibrous or foliated texture; likely Mohs 2.5–4, but the blurry image prevents reliable determination of cleavage, crystal structure, or specific gravity.
Formation & geological history
Likely formed by low- to moderate-temperature metamorphic alteration of ultramafic rock or mafic volcanic rock; commonly associated with oceanic crust and ancient mountain belts, with age dependent on its host terrain.
Uses & applications
Serpentinite may be used as decorative stone, carving material, and a source rock for some industrial minerals; an ordinary fragment has little commercial value.
Geological facts
The specimen appears geological rather than manufactured, but its exact identity cannot be confirmed visually from this image alone.
Field identification & locations
Look for a smooth or waxy green surface, dark veining, low hardness, and possible fibrous texture for serpentinite; a streak, hardness test, and close examination of foliation would help distinguish it from chlorite schist or weathered basalt. Common localities include California, Italy, New Zealand, and ophiolite belts worldwide.
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