mineral

Likely weathered stone or mineral fragment

Unidentified fine-grained silicate rock; possible basalt, greenstone, or serpentine

AI-generated identification · may be incorrect

Small rounded, olive-gray specimen with a dull to slightly earthy luster and no visible crystal faces. Hardness and cleavage cannot be determined reliably from the image; likely specific gravity around 2.6–3.3 if silicate-based.

Identified August 29, 2026More mineral →

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At a glance

Common name: Likely weathered stone or mineral fragment
Scientific name: Unidentified fine-grained silicate rock; possible basalt, greenstone, or serpentine
Category: mineral
Identified: August 29, 2026
Method: Standard

AI Estimated Value

Typically $0–$5 for a small unidentified fragment; possibly $5–$20 if confirmed as an attractive or locality-specific mineral specimen.

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

Probably a naturally weathered and water-rounded fragment of volcanic or metamorphic rock. Its geological age and formation environment cannot be established without testing or locality information.

Uses & applications

No specific industrial or jewelry use can be assigned from the photograph; it is mainly suitable as a curiosity or teaching specimen unless identified more precisely.

Geological facts

The green-gray color may reflect chlorite, epidote, or serpentine minerals, but lighting and surface weathering can produce similar colors in many rocks.

Field identification & locations

Common possibilities include basalt, greenstone, and serpentine from river gravels or eroded outcrops. Check for a streak, magnetism, translucency, acid reaction, and hardness; a fresh broken surface and locality are especially useful for identification.