metamorphic

Polished green-gray stone, possibly serpentine

Likely serpentine-group rock, composed mainly of serpentine minerals; identification is uncertain from the photo

AI-generated identification · may be incorrect

Opaque, mottled green-gray with a polished, waxy-to-greasy luster. Serpentine has Mohs hardness about 2.5–5.5 and commonly forms massive material without visible crystals; hardness and composition cannot be confirmed visually.

Identified October 13, 2026More metamorphic →

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At a glance

Common name: Polished green-gray stone, possibly serpentine
Scientific name: Likely serpentine-group rock, composed mainly of serpentine minerals; identification is uncertain from the photo
Category: metamorphic
Identified: October 13, 2026
Method: Standard

AI Estimated Value

Approximately $5–$25 for a small polished palm stone, depending on material, finish, and provenance.

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 magnesium-rich ultramafic rocks are altered by water, commonly during metamorphism at or near tectonic plate boundaries. Such rocks range widely in age.

Uses & applications

Polished serpentine is used for carvings, beads, ornaments, and decorative stone; softer material is generally unsuitable for demanding construction uses.

Geological facts

The smooth oval shape indicates the specimen has been shaped and polished; appearance alone cannot reliably distinguish serpentine from other green stones such as jade or aventurine.

Field identification & locations

Look for mottled green color, relatively low hardness, and a waxy feel; a scratch test or mineralogical testing would help confirm identity. Serpentinite occurs in many mountain belts worldwide.