metamorphic

Tumbled green stone, likely serpentine

Serpentine-group minerals, chiefly antigorite or lizardite; approximate composition Mg₃Si₂O₅(OH)₄

AI-generated identification · may be incorrect

Pale gray-green, fine-grained, matte to waxy luster, with numerous whitish fibrous or vein-like markings; hardness about 2.5–4 Mohs, generally massive rather than visibly crystalline, with poor cleavage and specific gravity around 2.5–2.6.

Identified September 13, 2026More metamorphic →

Explore Tumbled green stone, likely serpentine in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Tumbled green stone, likely serpentine
Scientific name: Serpentine-group minerals, chiefly antigorite or lizardite; approximate composition Mg₃Si₂O₅(OH)₄
Category: metamorphic
Identified: September 13, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a common tumbled specimen; higher only if verified as jade, a rare variety, or an attractive collectible locality piece.

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 by hydration and alteration of magnesium-rich ultramafic rocks such as peridotite, commonly in oceanic crust and subduction zones; ages vary widely from Precambrian to modern tectonic settings.

Uses & applications

Used as a decorative and carving stone, ornamental aggregate, and occasionally jewelry; this small tumbled piece has modest commercial value.

Geological facts

Serpentine is named for its often snake-like color and pattern. Some serpentine rocks contain chrysotile asbestos, so avoid cutting, drilling, or generating dust unless its composition is confirmed.

Field identification & locations

Identify by its soft, smooth, green waxy appearance and pale veins; common sources include California, Italy, Canada, New Zealand, and Afghanistan. The image alone cannot exclude green quartzite, jade-like rock, or another altered ultramafic stone.