metamorphic
Serpentinite
Serpentinite (Hydrated magnesium iron phyllosilicate)
AI-generated identification · may be incorrectHardness 2.5 to 5.5, mottled green to brownish color, greasy or waxy luster, massive crystal structure with imperfect cleavage.
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Physical properties
Hardness 2.5 to 5.5, mottled green to brownish color, greasy or waxy luster, massive crystal structure with imperfect cleavage.
Formation & geological history
Formed via serpentinization, a low-temperature metamorphic process altering ultramafic rocks from the Earth's mantle in the presence of water.
Uses & applications
Used primarily as an ornamental stone, architectural facing material, and occasionally for carving.
Geological facts
It is often designated as a state rock and frequently hosts valuable asbestos minerals and chrysotile veins.
Field identification & locations
Identify by its characteristic mottled green coloration and greasy feel; common in ophiolite sequences worldwide.
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