gemstone

Likely smoky quartz cabochon ring

Quartz, silicon dioxide (SiO₂), brown variety colored by irradiation and trace aluminum

AI-generated identification · may be incorrect

Large oval, transparent-to-translucent brown cabochon with vitreous luster; quartz is Mohs 7, trigonal crystal system, no cleavage, conchoidal fracture, and specific gravity about 2.65. The surrounding small stones and gold-colored setting are jewelry materials, not part of the geological specimen.

Identified September 19, 2026More gemstone →

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At a glance

Common name: Likely smoky quartz cabochon ring
Scientific name: Quartz, silicon dioxide (SiO₂), brown variety colored by irradiation and trace aluminum
Category: gemstone
Identified: September 19, 2026
Method: Standard

AI Estimated Value

About $20–$150 for a commercial smoky-quartz ring; approximately $150–$500+ if solid precious metal and a verified high-quality natural gemstone are present.

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

Smoky quartz forms in hydrothermal veins, pegmatites, and cavities of granitic rocks; its color commonly develops from natural radiation acting on trace impurities. Quartz is widespread and geologically spans much of Earth’s history, while the exact source and age cannot be determined from the photograph.

Uses & applications

Used as an ornamental gemstone in rings, pendants, and carvings; quartz is also important industrially in glass, electronics, and abrasives. The surrounding accent stones may be diamond, cubic zirconia, or another simulant.

Geological facts

The cabochon cut emphasizes color and internal reflections rather than facet brilliance. It could potentially be brown tourmaline, glass, or another dark gemstone, but the appearance is most consistent with smoky quartz.

Field identification & locations

Check for quartz’s hardness, conchoidal fracture, and lack of cleavage; a gemological refractometer or spectroscopy is needed for confirmation. Common sources include Brazil, Switzerland, Madagascar, and the United States.