mineral

Tumbled green stone, likely green aventurine

Aventurine quartz (SiO₂) with fine fuchsite or other mica inclusions; identification from the photo is tentative

AI-generated identification · may be incorrect

Opaque to translucent green, polished, with a vitreous-to-waxy luster; quartz has a trigonal crystal structure and Mohs hardness of 7. The smooth rounded shape is from tumbling, not natural crystal growth.

Identified October 10, 2026More mineral →

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At a glance

Common name: Tumbled green stone, likely green aventurine
Scientific name: Aventurine quartz (SiO₂) with fine fuchsite or other mica inclusions; identification from the photo is tentative
Category: mineral
Identified: October 10, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a small common tumbled stone; higher prices require confirmed identity, quality, or 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

Quartz formed in silica-rich veins or metamorphic rocks, with green mica inclusions producing the color and shimmer. Its geological age depends on the deposit and cannot be determined from the image.

Uses & applications

Commonly used for beads, cabochons, carvings, and decorative objects; not generally used as a major construction stone.

Geological facts

Aventurine’s characteristic sparkle, called aventurescence, comes from reflective mineral flakes; this specimen appears subdued, so another green stone is possible.

Field identification & locations

Aventurine is often found in India, Brazil, Russia, and Tanzania. Check for fine glitter and quartz-like hardness; the photo alone cannot distinguish it reliably from jade, serpentine, or other tumbled green stones.