mineral

Tumbled mottled stone, likely serpentine or jasper

Probable serpentine-group mineral (Mg₃Si₂O₅(OH)₄) or fine-grained jasper; identification is limited by the image

AI-generated identification · may be incorrect

Small polished/tumbled specimen with cream, gray, and olive-green mottling; opaque, dull-to-waxy luster, likely hardness Mohs 2.5–7 depending on composition, with no visible cleavage or crystals.

Identified September 19, 2026More mineral →

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At a glance

Common name: Tumbled mottled stone, likely serpentine or jasper
Scientific name: Probable serpentine-group mineral (Mg₃Si₂O₅(OH)₄) or fine-grained jasper; identification is limited by the image
Category: mineral
Identified: September 19, 2026
Method: Standard

AI Estimated Value

Approximately $1–$10 as a small common tumbled stone; higher only if confirmed as an attractive or unusual variety.

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

Small polished/tumbled specimen with cream, gray, and olive-green mottling; opaque, dull-to-waxy luster, likely hardness Mohs 2.5–7 depending on composition, with no visible cleavage or crystals.

Formation & geological history

If serpentine, it formed by hydrothermal alteration of ultramafic rocks, commonly during ancient oceanic or mountain-building processes; if jasper, it is silica-rich microcrystalline quartz formed from sedimentary or volcanic material.

Uses & applications

Small pieces are used for lapidary crafts, cabochons, beads, and collections; serpentine is also used decoratively, while jasper is sometimes used in ornaments and countertops.

Geological facts

The green coloration may reflect iron-bearing serpentine minerals, but the cream matrix and mottling can also occur in several jasper varieties.

Field identification & locations

Field testing helps: serpentine is relatively soft and may scratch with a knife, whereas jasper typically scratches glass; streak, specific gravity, and a close look at translucency would improve identification. Common sources include California, Italy, New Zealand, and worldwide jasper deposits.