mineral

Tumbled pale-green stone, likely serpentine or aventurine

Most likely serpentine-group mineral (Mg₃Si₂O₅(OH)₄) or green aventurine quartz (SiO₂); identification is uncertain from the photograph alone.

AI-generated identification · may be incorrect

Smoothly tumbled, pale sage-green, translucent to opaque, with a waxy-to-dull luster and a small rusty inclusion. Serpentine is Mohs 2.5–4; aventurine quartz is Mohs 7; neither cleavage nor crystal form is visible.

Identified August 23, 2026More mineral →

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At a glance

Common name: Tumbled pale-green stone, likely serpentine or aventurine
Scientific name: Most likely serpentine-group mineral (Mg₃Si₂O₅(OH)₄) or green aventurine quartz (SiO₂); identification is uncertain from the photograph alone.
Category: mineral
Identified: August 23, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 as a common tumbled stone; larger, attractive or confirmed 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 hydrothermally alter, commonly during oceanic-plate or mountain-building processes; aventurine forms in silica-rich veins. Geological ages vary widely.

Uses & applications

Used as a decorative tumbled stone, carving material, and ornamental aggregate; aventurine is also used in low-cost jewelry.

Geological facts

The color may come from iron-bearing serpentine minerals or fuchsite mica in aventurine. A hardness test and specific-gravity measurement are needed for confident identification.

Field identification & locations

Common sources include California, New Zealand, Italy, Russia, India, and Brazil. Test inconspicuous areas: quartz scratches glass, whereas serpentine usually does not; avoid relying on color alone.