metamorphic

Serpentine Sphere

Serpentinite

AI-generated identification · may be incorrect

Hardness: 2.5-4, Color: dark green to black with lighter green or white veining, Luster: greasy to waxy, Crystal structure: monoclinic (often massive), Cleavage: poor, Specific gravity: 2.5-2.6

Hardness: 2

Identified September 19, 2026More metamorphic →

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Physical properties

Hardness: 2.5-4, Color: dark green to black with lighter green or white veining, Luster: greasy to waxy, Crystal structure: monoclinic (often massive), Cleavage: poor, Specific gravity: 2.5-2.6

Formation & geological history

Formed by the hydration and metamorphic transformation of ultramafic rock from the Earth's mantle (peridotite). Found in convergent plate boundaries and ophiolite complexes.

Uses & applications

Used primarily as an ornamental stone, for carvings, and sometimes in jewelry. Also collected as polished spheres or tumbled stones.

Geological facts

Serpentine is actually a group of minerals, not just one. It's the state rock of California.

Field identification & locations

Identify by its dark greenish-black color, lighter veining, relatively low hardness (can be scratched by a knife), and greasy feel. Commonly found in areas with tectonic plate subduction.