metamorphic
Serpentine-rich rock (possibly lizardite/serpentinite)
Serpentinite, composed chiefly of serpentine-group minerals such as lizardite, antigorite, or chrysotile
AI-generated identification · may be incorrectThe small specimen appears pale green with dark patches and a dull to waxy surface; exact hardness and mineral composition cannot be confirmed from the image. Serpentine minerals typically have Mohs hardness of 2.5–5 and form fine-grained, often massive aggregates.
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Physical properties
The small specimen appears pale green with dark patches and a dull to waxy surface; exact hardness and mineral composition cannot be confirmed from the image. Serpentine minerals typically have Mohs hardness of 2.5–5 and form fine-grained, often massive aggregates.
Formation & geological history
Forms when water alters magnesium-rich ultramafic rocks, commonly in oceanic crust and along tectonic plate boundaries; the specimen’s age and locality are unknown.
Uses & applications
Serpentinite is used as decorative stone, carving material, and a source of some industrial minerals; attractive pieces may be collected or polished.
Geological facts
The name refers to its often snake-like colors and patterns. Chrysotile, one serpentine mineral, is an asbestos form and should not be cut or ground without identifying it.
Field identification & locations
A green color with dark veining and a smooth, waxy feel can suggest serpentinite, but the photo is insufficient for reliable identification; a hardness or mineral test would help. Serpentinite occurs worldwide in mountain belts and altered oceanic rocks.
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