mineral

Polished/tumbled stone, likely serpentine or agate

Probable serpentine-group mineral (antigorite/lizardite), possibly a green jasper or agate; image is insufficient for certainty

AI-generated identification · may be incorrect

Small polished translucent-to-opaque green specimen with darker linear banding and a bluish central zone; likely Mohs 3–6, waxy to vitreous luster, fine-grained and lacking visible cleavage. Color and pattern may also reflect dyed or composite lapidary material.

Identified August 28, 2026More mineral →

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At a glance

Common name: Polished/tumbled stone, likely serpentine or agate
Scientific name: Probable serpentine-group mineral (antigorite/lizardite), possibly a green jasper or agate; image is insufficient for certainty
Category: mineral
Identified: August 28, 2026
Method: Standard

AI Estimated Value

Approximately $3–$20 for a common small polished specimen; $25–$100+ if confirmed as an attractive, unusual gemstone-quality material.

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

If serpentine, it formed by hydration and alteration of ultramafic mantle rocks during metamorphism, commonly in ophiolites; if agate/jasper, it formed from silica-rich groundwater filling volcanic cavities. Geological ages vary widely.

Uses & applications

Used as a decorative and carving stone, ornamental cabochon, or collector specimen; serpentine is also used for tiles and architectural objects. Typical small polished pieces have modest value.

Geological facts

The visible banding resembles natural mineral veining, but strong color saturation and the smooth cut surface prevent reliable identification from the photograph alone.

Field identification & locations

Check streak, hardness, translucency, and specific gravity; a loupe, scratch test, and UV response may help, while Raman/XRF testing is definitive. Common sources include California, New Zealand, Italy, and Afghanistan for serpentine-related material.