metamorphic

Serpentine pendant

Serpentinite; chiefly antigorite, lizardite, or chrysotile Mg₃Si₂O₅(OH)₄

AI-generated identification · may be incorrect

Typically pale to dark green with mottled or veined patterns, waxy to greasy luster, and weakly translucent edges; Mohs hardness 2.5–5. Cleavage is poor, structure commonly massive or fibrous, and specific gravity is about 2.5–2.6.

Identified August 12, 2026More metamorphic →

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Physical properties

Formation & geological history

Forms when ultramafic mantle rocks such as peridotite undergo hydration and low-temperature metamorphism, commonly along tectonic plate boundaries; specimens may range from ancient Precambrian to younger geologic ages.

Uses & applications

Used as an ornamental and carving stone, jewelry pendant material, and historically in architecture; fibrous chrysotile varieties are asbestos-bearing and hazardous when dust is generated.

Geological facts

The image shows a shaped, polished green specimen with darker veining, consistent with serpentine rather than a distinct crystal mineral. Serpentine is also California’s state rock.

Field identification & locations

Identify it by its green mottling, relatively low hardness, waxy polish, and softness compared with jade; avoid cutting, drilling, or abrading unknown fibrous material. Common sources include California, Italy, New Zealand, Canada, and Afghanistan.