metamorphic
Serpentine pendant
Serpentinite; chiefly antigorite, lizardite, or chrysotile Mg₃Si₂O₅(OH)₄
AI-generated identification · may be incorrectTypically 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.
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Physical properties
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.
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.
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