metamorphic
Polished serpentine pendant
Serpentinite, composed chiefly of serpentine-group minerals (often antigorite, lizardite, or chrysotile)
AI-generated identification · may be incorrectTypically Mohs 2.5–4; mottled dark green to olive with brown or black veining, waxy to greasy luster, and very fine-grained massive texture. The pictured material is polished and drilled, so natural cleavage and grain structure are obscured.
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Physical properties
Typically Mohs 2.5–4; mottled dark green to olive with brown or black veining, waxy to greasy luster, and very fine-grained massive texture. The pictured material is polished and drilled, so natural cleavage and grain structure are obscured.
Formation & geological history
Forms when ultramafic mantle rocks such as peridotite hydrate during hydrothermal alteration, commonly along faults and oceanic crust; ages range from Precambrian to modern tectonic settings. It is commonly associated with talc, magnetite, and chromite.
Uses & applications
Used as ornamental stone, carvings, beads, cabochons, and jewelry; larger blocks may be used for decorative facing, though its softness limits construction applications.
Geological facts
Serpentinite often contains magnetite and may be weakly magnetic; some varieties can contain asbestos-form chrysotile, so avoid cutting, drilling, or generating dust without proper controls.
Field identification & locations
Identify by its green mottled appearance, low hardness, waxy polish, and occasional magnetic response; common localities include California, Italy, New Zealand, Canada, and the Appalachian region. This is likely a wearable pendant rather than an unprocessed field specimen.
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