metamorphic

Possibly serpentine or weathered greenstone

Serpentinite (magnesium silicate minerals, commonly lizardite/chrysotile); exact identification is uncertain from the image

AI-generated identification · may be incorrect

Small rounded pebble with pale green, yellow, and gray coloration and a dull to waxy luster; likely Mohs hardness 2.5–4, with no visible crystal structure or cleavage. Serpentinite commonly has specific gravity around 2.5–2.6.

Identified September 13, 2026More metamorphic →

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At a glance

Common name: Possibly serpentine or weathered greenstone
Scientific name: Serpentinite (magnesium silicate minerals, commonly lizardite/chrysotile); exact identification is uncertain from the image
Category: metamorphic
Identified: September 13, 2026
Method: Standard

AI Estimated Value

About $1–$10 as an ordinary pebble; $10–$50 if confirmed, attractive, and suitable for carving.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Likely formed by hydration and alteration of ultramafic mantle rock, often during ancient oceanic or tectonic processes; age cannot be determined visually. Surface rounding indicates transport by water or glacial action.

Uses & applications

Used as decorative stone, carving material, and occasionally architectural facing; attractive pieces may be sold as lapidary rough or polished cabochons.

Geological facts

Serpentinite can resemble jade, but is generally softer and less tough. Some varieties contain fibrous chrysotile, so avoid cutting, drilling, or generating dust unless professionally tested.

Field identification & locations

Common in ophiolite belts and tectonically active regions, including California, Italy, New Zealand, and parts of Canada. Field clues include a greasy/waxy feel, green mottling, low hardness, and possible dark veining.