metamorphic
Serpentine
(Mg,Fe)3Si2O5(OH)4
AI-generated identification · may be incorrectHardness of 2.5 to 5.5 on the Mohs scale, waxy or greasy luster, and shades of green to yellowish-green.
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Physical properties
Hardness of 2.5 to 5.5 on the Mohs scale, waxy or greasy luster, and shades of green to yellowish-green.
Formation & geological history
Formed through the hydrothermal alteration of ultramafic rocks from the Earth's mantle, typically in convergent plate boundaries.
Uses & applications
Used in ornamental carvings, asbestos production historically, and as a popular tumbled stone for jewelry and collection.
Geological facts
Serpentine is the state rock of California and often displays a mottled, snake-like skin appearance which gives it its name.
Field identification & locations
Easily identified by its characteristic green color, softness, and greasy feel; found globally in ophiolite sequences.
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