mineral

Likely tumbled green stone (possibly serpentine or green aventurine)

Indeterminate from image; candidates include serpentine-group minerals or quartz-rich green aventurine

AI-generated identification · may be incorrect

Small, rounded dark-green specimen with a dull to weakly waxy luster; hardness is approximately 2.5–4 for serpentine or 6–7 for aventurine. Crystal structure, cleavage, and specific gravity cannot be determined reliably from this blurred image.

Identified August 15, 2026More mineral →

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At a glance

Common name: Likely tumbled green stone (possibly serpentine or green aventurine)
Scientific name: Indeterminate from image; candidates include serpentine-group minerals or quartz-rich green aventurine
Category: mineral
Identified: August 15, 2026
Method: Standard

AI Estimated Value

Approximately $1–$10 for a small common tumbled stone; higher-quality polished or identified specimens may sell for $10–$30.

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 undergo hydration and metamorphism; aventurine forms in quartz veins or metamorphic rocks with green mica or fuchsite inclusions. Geological ages vary by locality.

Uses & applications

Small pieces are commonly used in lapidary work, tumbled-stone collections, carvings, and inexpensive jewelry; serpentine is also used decoratively.

Geological facts

The specimen appears human-rounded or tumbled, so natural crystal faces and texture are obscured. A clearer close-up, streak test, hardness test, and specific-gravity measurement would be needed for confident identification.

Field identification & locations

Look for mottled green color and a waxy surface in serpentine, or translucent quartz with glittering mica in aventurine. Common sources include California, Italy, New Zealand, India, Brazil, and South Africa.