gemstone

Green cabochon gemstone, likely aventurine or dyed chalcedony

Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony

AI-generated identification · may be incorrect

Opaque to translucent green oval cabochon with a polished, vitreous-to-waxy luster; apparent hardness is about Mohs 6.5–7 if quartz. The silver-colored setting and small decorative metal elements are human-made, but the central stone may be geological material.

Identified August 11, 2026More gemstone →

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At a glance

Common name: Green cabochon gemstone, likely aventurine or dyed chalcedony
Scientific name: Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony
Category: gemstone
Identified: August 11, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a common mounted imitation or quartz cabochon; $30–$150+ if confirmed as a quality natural gemstone, excluding precious-metal value.

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 gemstones form in hydrothermal veins or silica-rich cavities; green color can result from fuchsite mica, chlorite, or artificial dyeing. Geological age cannot be determined visually.

Uses & applications

Used in inexpensive jewelry and ornamental cabochons; value depends strongly on confirmed identity, color, transparency, treatment, and metal content.

Geological facts

The image does not show diagnostic crystal faces, inclusions, or translucency clearly enough for a secure identification; it could also be green glass or another synthetic material, which would not qualify as a geological specimen.

Field identification & locations

Check with a loupe for glittery mica (aventurine), fibrous translucency (chalcedony), or bubbles (glass); test hardness only on an inconspicuous area, since mounted stones may be damaged. Common sources include India, Brazil, Madagascar, and China.