mineral

Tumbled green stone, likely aventurine or dyed agate

Tentatively quartz-rich green aventurine (SiO₂) or chrysoprase (microcrystalline chalcedony, SiO₂); identification is uncertain from the image

AI-generated identification · may be incorrect

Opaque to translucent vivid green, polished/tumbled, with a waxy to vitreous luster and apparent fractures or inclusions. Quartz varieties have Mohs hardness about 6.5–7 and specific gravity near 2.6; possible dyeing cannot be excluded.

Identified August 13, 2026More mineral →

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At a glance

Common name: Tumbled green stone, likely aventurine or dyed agate
Scientific name: Tentatively quartz-rich green aventurine (SiO₂) or chrysoprase (microcrystalline chalcedony, SiO₂); identification is uncertain from the image
Category: mineral
Identified: August 13, 2026
Method: Standard

AI Estimated Value

About $1–$10 as a small common tumbled stone; $10–$50 if verified natural, attractive chrysoprase or aventurine.

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

Aventurine forms when quartz crystallizes with fuchsite or other green inclusions; chrysoprase forms as nickel-bearing chalcedony in weathered ultramafic environments. These materials are geologically young to ancient depending on the host deposit.

Uses & applications

Used for beads, cabochons, ornaments, and inexpensive decorative stones; polished pieces have modest lapidary value.

Geological facts

The intense, fairly uniform color and rounded polish may indicate dyed quartz, serpentine, or another treated stone rather than natural high-grade chrysoprase.

Field identification & locations

Check for glittery fuchsite reflections (aventurine), waxy translucence (chrysoprase), scratches against glass, and color concentration in cracks; definitive identification requires testing or laboratory analysis. Common sources include India, Brazil, Russia, Australia, and Madagascar.