mineral
Green serpentine-rich stone
Serpentine-group minerals, chiefly antigorite/lizardite; possibly nephrite or chlorite-bearing rock
AI-generated identification · may be incorrectOlive-green, opaque, earthy to waxy luster with mottled pale veins; likely Mohs 2.5–5.5 depending on composition, massive rather than visibly crystalline, with poor cleavage and specific gravity about 2.5–3.3.
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Physical properties
Olive-green, opaque, earthy to waxy luster with mottled pale veins; likely Mohs 2.5–5.5 depending on composition, massive rather than visibly crystalline, with poor cleavage and specific gravity about 2.5–3.3.
Formation & geological history
Most likely formed when ultramafic mantle rocks were hydrated and metamorphosed during tectonic activity; serpentinization commonly ranges from Paleozoic to modern geological settings. The photograph alone cannot establish an exact age or species.
Uses & applications
Serpentine is used for ornamental stone, carvings, countertops, and historically as a source of magnesium and asbestos minerals; attractive pieces may be collected, though this specimen appears low-grade and unpolished.
Geological facts
Its green color commonly comes from iron- and magnesium-rich serpentine minerals. Fibrous varieties can contain chrysotile asbestos, so avoid cutting, sanding, or crushing unknown material.
Field identification & locations
Look for a relatively soft, greasy or waxy feel, mottled olive-green color, and pale veining; it may scratch with a steel knife if strongly serpentinized. Common occurrences include California, Italy, New Zealand, Canada, and the Appalachian region.
