![Serpentine (likely polished/tumbled) (Serpentinite; mainly antigorite, lizardite, and/or chrysotile [Mg₃Si₂O₅(OH)₄]) — metamorphic](https://media.rock.id/serpentine-likely-polished-tumbled-833706d0-72a0-41c8-8964-e7fc427c4f8a-compressed.jpg)
metamorphic
Serpentine (likely polished/tumbled)
Serpentinite; mainly antigorite, lizardite, and/or chrysotile [Mg₃Si₂O₅(OH)₄]
AI-generated identification · may be incorrectTypically olive to apple green with mottled veining, waxy to greasy luster, and a smooth polished surface; Mohs hardness 2.5–4, poor cleavage, massive texture, and specific gravity about 2.5–2.6.
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Physical properties
Typically olive to apple green with mottled veining, waxy to greasy luster, and a smooth polished surface; Mohs hardness 2.5–4, poor cleavage, massive texture, and specific gravity about 2.5–2.6.
Formation & geological history
Forms when ultramafic mantle rocks such as peridotite undergo hydration and alteration, commonly along faults and oceanic crust; many specimens formed during the Paleozoic–Mesozoic or younger tectonic events.
Uses & applications
Used as ornamental stone, carvings, cabochons, countertops, and decorative objects; historically used for some low-cost jewelry and architectural facing.
Geological facts
Its green color comes from iron- and nickel-bearing serpentine minerals and associated magnetite. Some varieties may contain chrysotile asbestos, so avoid cutting, drilling, or generating dust unless composition is confirmed.
Field identification & locations
Identify by its green mottling, waxy feel, relatively low hardness, and occasional black magnetite specks; common in California, Italy, New Zealand, Canada, and tectonic belts worldwide.
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