gemstone

Purple cabochon gemstone, likely amethyst or purple sapphire/spinel

Indeterminate from image; possible quartz (SiO₂), corundum (Al₂O₃), or spinel (MgAl₂O₄)

AI-generated identification · may be incorrect

The ring contains a smooth, polished purple cabochon with vitreous luster and apparent translucent edges. Amethyst is Mohs 7; sapphire 9; spinel 8, so hardness testing, magnification, and refractive-index measurements are needed for identification.

Identified September 11, 2026More gemstone →

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At a glance

Common name: Purple cabochon gemstone, likely amethyst or purple sapphire/spinel
Scientific name: Indeterminate from image; possible quartz (SiO₂), corundum (Al₂O₃), or spinel (MgAl₂O₄)
Category: gemstone
Identified: September 11, 2026
Method: Standard

AI Estimated Value

Approximately $10–$100 for common amethyst or synthetic material; $100–$1,000+ if confirmed natural, high-quality sapphire or spinel. The complete ring’s metal and craftsmanship may dominate 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

If amethyst, it formed in silica-rich cavities of volcanic rocks through hydrothermal processes; if sapphire or spinel, it formed in metamorphic or igneous environments. The photograph cannot establish geological age or treatment.

Uses & applications

Used primarily in jewelry; value depends strongly on species, natural versus synthetic origin, treatment, color, transparency, and workmanship.

Geological facts

The intense uniform purple color and cabochon cut do not uniquely identify it; dyed quartz, synthetic corundum, and synthetic spinel are possible. The adjacent yellow stone also cannot be identified reliably from this image.

Field identification & locations

Near 26.1°N, 85.4°E, alluvial quartz and occasional transported gemstones are more plausible than a locally formed sapphire deposit. Check for bubbles, color zoning, inclusions, and scratches; gemological refractive index and specific-gravity tests are decisive.