gemstone

Faceted brown gemstone in a silver-colored setting

Likely smoky quartz (SiO₂), but the photo cannot reliably distinguish it from other brown gems or glass

AI-generated identification · may be incorrect

Rectangular faceted, transparent-to-translucent brown stone with strong reflections; setting obscures diagnostic features. If smoky quartz, hardness is 7 Mohs and its crystal structure is trigonal.

Identified September 26, 2026More gemstone →

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At a glance

Common name: Faceted brown gemstone in a silver-colored setting
Scientific name: Likely smoky quartz (SiO₂), but the photo cannot reliably distinguish it from other brown gems or glass
Category: gemstone
Identified: September 26, 2026
Method: Standard

AI Estimated Value

Approximately $10–$200 for a costume or silver-set piece; substantially more if the stone or precious-metal setting is verified as high quality.

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

Rectangular faceted, transparent-to-translucent brown stone with strong reflections; setting obscures diagnostic features. If smoky quartz, hardness is 7 Mohs and its crystal structure is trigonal.

Formation & geological history

Smoky quartz forms in silica-rich pegmatites and hydrothermal veins; its brown color typically results from natural irradiation acting on trace aluminum. The age depends on the deposit and cannot be determined from the image.

Uses & applications

Mounted jewelry; smoky quartz is also used for decorative carvings and mineral collecting.

Geological facts

The visible stone is set in a finished piece of jewelry, so its identity cannot be confirmed visually; brown color alone is not diagnostic.

Field identification & locations

Check for a gemological report or have the loose stone tested for refractive index and other properties. Comparable mounted jewelry varies widely in value with stone identity, metal, workmanship, and condition.