gemstone

Tumbled green stone, possibly jade or green aventurine

Undetermined from the image; possibilities include jadeite (NaAlSi₂O₆), nephrite (Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂), or quartz aventurine (SiO₂)

AI-generated identification · may be incorrect

Small, polished opaque-to-translucent dark-green cabochon with a glossy luster. Hardness and crystal structure depend on material: jadeite 6.5–7 Mohs, nephrite 6–6.5, aventurine quartz 7; image alone cannot confirm identity.

Identified October 15, 2026More gemstone →

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At a glance

Common name: Tumbled green stone, possibly jade or green aventurine
Scientific name: Undetermined from the image; possibilities include jadeite (NaAlSi₂O₆), nephrite (Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂), or quartz aventurine (SiO₂)
Category: gemstone
Identified: October 15, 2026
Method: Standard

AI Estimated Value

About $1–$20 if common aventurine or a small, low-grade stone; genuine jade value varies widely and requires verified identification.

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

If jade, formed through metamorphic processes in high-pressure rocks; if aventurine, formed as quartz with green mica or other inclusions. Geological age and origin cannot be determined from appearance alone.

Uses & applications

Likely used as a jewelry stone, bead, or pocket collectible; jade may be carved, while aventurine is commonly used for beads and ornaments.

Geological facts

Jade is a trade term for two distinct minerals—jadeite and nephrite—and visual appearance alone is not enough to distinguish them.

Field identification & locations

A gemological test is needed for identification; inspect for natural inclusions and seek hardness, density, and refractive-index measurements. Green polished stones are commonly sold as jade, aventurine, or dyed substitutes.