metamorphic

Rounded yellow-green stone, likely serpentine or weathered greenstone

Serpentine-group minerals, commonly antigorite or lizardite; exact identification requires testing

AI-generated identification · may be incorrect

Opaque olive-yellow green, dull to waxy luster, smoothly rounded and probably water-worn; likely Mohs hardness 2.5–4, with no visible crystals or cleavage. Specific gravity is commonly about 2.5–2.6.

Identified September 16, 2026More metamorphic →

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At a glance

Common name: Rounded yellow-green stone, likely serpentine or weathered greenstone
Scientific name: Serpentine-group minerals, commonly antigorite or lizardite; exact identification requires testing
Category: metamorphic
Identified: September 16, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 as an unverified common pebble; approximately $10–$30 if confirmed attractive lapidary serpentine.

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

Serpentine forms when ultramafic rocks such as peridotite are hydrated during metamorphism, commonly in ophiolites and fault zones; its age depends on the host terrain. The rounded shape indicates later stream or beach transport.

Uses & applications

Usually collected as a curiosity or lapidary stone; suitable pieces may be polished for cabochons or carvings, but this small specimen has little industrial value.

Geological facts

The image alone cannot distinguish serpentine from epidote-rich greenstone, altered basalt, or another weathered rock. Some serpentine rocks may contain fibrous chrysotile, so avoid cutting, grinding, or creating dust until tested.

Field identification & locations

Look for a greasy or waxy feel, green-to-yellow color, low hardness, and possible white veining; a steel nail may scratch it. Common settings include California, Oregon, Italy, New Zealand, and ophiolite belts worldwide.