metamorphic
Serpentine
Serpentine group (hydrated magnesium silicate, (Mg,Fe)3Si2O5(OH)4)
AI-generated identification · may be incorrectMohs hardness of 3 to 5, waxy or greasy luster, and typically green, yellow-green, or brownish-green coloration with a monoclinic crystal system.
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Physical properties
Mohs hardness of 3 to 5, waxy or greasy luster, and typically green, yellow-green, or brownish-green coloration with a monoclinic crystal system.
Formation & geological history
Formed via metamorphism of ultramafic rocks from the Earth's mantle in hydrothermal environments at convergent plate boundaries.
Uses & applications
Used widely as an ornamental stone, for carving, in architecture, and historically as a source of asbestos.
Geological facts
Serpentine is the state rock of California and often features mottled patterns resembling snake skin, which inspired its name.
Field identification & locations
Easily identified by its soft, soapy feel and characteristic green coloring with dark veining; found globally in ophiolite belts.
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