metamorphic
Likely serpentine-rich pebble
Serpentinite (predominantly serpentine-group minerals; exact identification cannot be confirmed from the image)
AI-generated identification · may be incorrectSmall, rounded, pale olive-green to cream specimen with a mottled, slightly reflective surface. Serpentine minerals have Mohs hardness about 2.5–5.5, typically waxy to greasy luster, and no consistent visible crystal structure; density and cleavage vary by mineral mix.
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Physical properties
Small, rounded, pale olive-green to cream specimen with a mottled, slightly reflective surface. Serpentine minerals have Mohs hardness about 2.5–5.5, typically waxy to greasy luster, and no consistent visible crystal structure; density and cleavage vary by mineral mix.
Formation & geological history
Serpentinite forms when water alters ultramafic mantle rocks, commonly along ancient oceanic crust and tectonic plate boundaries. This pebble’s age and precise formation environment cannot be determined visually.
Uses & applications
Serpentinite is used as decorative stone, carvings, and occasionally dimension stone; this small pebble is primarily a keepsake or collector specimen.
Geological facts
Green serpentinite can resemble jade, but appearance alone is insufficient to establish jade or even confirm serpentinite.
Field identification & locations
The rounded shape suggests transport by water or abrasion. Check for a smooth, waxy feel and relatively low hardness; common occurrences include mountain belts and former ocean-floor rocks.
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