gemstone

Cut red gemstone in a gold ring

Likely ruby (corundum, Al₂O₃), though red spinel or garnet is also possible from the image

AI-generated identification · may be incorrect

Red transparent faceted stone with vitreous luster; ruby hardness is Mohs 9, spinel 8, and garnet 6.5–7.5. Crystal structure cannot be determined visually; the surrounding rings appear to be gold-colored metal.

Identified August 29, 2026More gemstone →

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At a glance

Common name: Cut red gemstone in a gold ring
Scientific name: Likely ruby (corundum, Al₂O₃), though red spinel or garnet is also possible from the image
Category: gemstone
Identified: August 29, 2026
Method: Standard

AI Estimated Value

Approximately $50–$500 for costume or common treated jewelry; fine natural ruby jewelry can range from $1,000 to over $100,000, depending on authentication and 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

Formation & geological history

Ruby forms in metamorphic rocks, especially marble and aluminum-rich schists, through high-temperature geological processes; gem deposits range from ancient Precambrian to younger formations. Spinel and garnet have different geological origins and require testing for confirmation.

Uses & applications

Used primarily in jewelry; ruby is valued for vivid color, transparency, size, and treatment status. Gold rings may have substantial value independent of the stone.

Geological facts

Visual identification is unreliable: ruby, red spinel, garnet, and synthetic corundum can look similar. A refractometer, specific-gravity test, loupe examination, and laboratory report are needed for confident identification.

Field identification & locations

Common ruby sources include Myanmar, Mozambique, Sri Lanka, Thailand, and Vietnam; garnet and spinel occur widely worldwide. Check for inclusions, metal hallmarks, scratches, and professional gem certification.