metamorphic

Serpentine (Serpentinite)

Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)

AI-generated identification · may be incorrect

Hardness 3-6 Mohs, dull to waxy luster, shades of olive green, brownish-yellow weathering crust, fibrous or massive structure, specific gravity 2.5-2.6

Identified July 23, 2026More metamorphic →

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Physical properties

Hardness 3-6 Mohs, dull to waxy luster, shades of olive green, brownish-yellow weathering crust, fibrous or massive structure, specific gravity 2.5-2.6

Formation & geological history

Formed through hydration and metamorphic alteration of ultramafic igneous rocks such as peridotite in subduction zones and oceanic crust environments.

Uses & applications

Used as an ornamental stone, carving material, source of asbestos (in chrysotile form), and occasionally as a low-grade dimension stone.

Geological facts

Serpentine gets its name from its serpent-like, mottled green appearance resembling snake skin. It is the official state rock of California.

Field identification & locations

Identified by its distinctive yellowish-green to deep green hues, greasy or waxy surface feel, and softer hardness compared to quartz. Common along coastal ophiolite belts and beach gravels.