mineral

Tumbled green serpentine (probable)

Serpentine-group minerals, chiefly antigorite and lizardite; hydrated magnesium silicate, approximately Mg₃Si₂O₅(OH)₄

AI-generated identification · may be incorrect

Small polished/tumbled olive-green specimen with mottled yellow-green areas and dull-to-waxy luster; serpentine hardness is about 2.5–4 Mohs, with poor cleavage and a massive, fine-grained structure. The image alone cannot exclude prehnite, jade-like material, or another green stone.

Identified August 16, 2026More mineral →

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At a glance

Common name: Tumbled green serpentine (probable)
Scientific name: Serpentine-group minerals, chiefly antigorite and lizardite; hydrated magnesium silicate, approximately Mg₃Si₂O₅(OH)₄
Category: mineral
Identified: August 16, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a small common tumbled stone; higher-quality carvings or verified jade-like material may cost more.

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

Forms mainly by hydrothermal alteration of magnesium-rich ultramafic rocks, especially peridotite, during ancient and modern plate-tectonic processes. Commonly occurs in ophiolites and metamorphic belts.

Uses & applications

Used as ornamental stone, carvings, beads, and low-cost cabochons; massive serpentine is also used decoratively in architecture, though fibrous asbestos-bearing varieties require caution.

Geological facts

Its greasy or waxy feel and mottled “snake-skin” appearance are characteristic. Some serpentine deposits contain chrysotile asbestos, but a polished pebble cannot be assessed safely from a photograph.

Field identification & locations

Look for low hardness, olive-to-yellow-green mottling, waxy luster, and a light streak; definitive identification requires hardness, specific-gravity, and possibly Raman or X-ray testing. Found worldwide, notably Italy, Canada, California, New Zealand, and the Ural Mountains.