mineral

Tumbled green stone, likely aventurine or dyed quartz

Quartz (SiO₂), possibly fuchsite-bearing green aventurine; exact identification requires testing

AI-generated identification · may be incorrect

Small polished/tumbled specimen with dark green color and vitreous-to-waxy luster. Quartz hardness is Mohs 7, with no cleavage, conchoidal fracture, and specific gravity about 2.65; the image is insufficient to confirm composition or treatments.

Identified September 17, 2026More mineral →

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At a glance

Common name: Tumbled green stone, likely aventurine or dyed quartz
Scientific name: Quartz (SiO₂), possibly fuchsite-bearing green aventurine; exact identification requires testing
Category: mineral
Identified: September 17, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a small common tumbled stone; $10–$30 for attractive natural aventurine or a larger 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

Green aventurine forms when quartz crystallizes with fuchsite or other green inclusions in metamorphic or hydrothermal environments; quartz-bearing rocks commonly formed over millions to billions of years. Similar stones may be dyed chalcedony or serpentine.

Uses & applications

Used as a decorative tumbled stone, ornamental material, and inexpensive jewelry bead; collector value is generally low unless unusually vivid, translucent, or naturally chatoyant.

Geological facts

Natural aventurine commonly shows fine glitter (aventurescence) from mica inclusions, while dyed stones often have unnaturally uniform color or color concentrated in fractures.

Field identification & locations

Check for sparkle, translucency, hardness, and color stability; quartz should scratch glass, though this test can damage the specimen. Common sources include India, Brazil, Russia, and Zimbabwe.