gemstone

Mounted clear gemstone, likely cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂), synthetic; exact stone cannot be confirmed from the image

AI-generated identification · may be incorrect

Colorless, transparent, highly brilliant, faceted stone in a metal ring; cubic zirconia has Mohs hardness about 8–8.5, adamantine luster, cubic crystal structure, and no cleavage. Diamond is a possible but much less supportable alternative without testing.

Identified September 10, 2026More gemstone →

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At a glance

Common name: Mounted clear gemstone, likely cubic zirconia
Scientific name: Cubic zirconia (zirconium dioxide, ZrO₂), synthetic; exact stone cannot be confirmed from the image
Category: gemstone
Identified: September 10, 2026
Method: Standard

AI Estimated Value

Approximately $10–$75 for a typical CZ ring; $50–$300 if the setting is confirmed sterling silver and well made. A diamond or precious-metal identification could raise the value substantially.

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

Cubic zirconia is laboratory-grown by melting zirconium oxide with stabilizers; it is not a naturally formed rock and has no geological age. Natural diamond forms deep in Earth’s mantle under extreme pressure and heat, whereas this appearance alone cannot distinguish the two.

Uses & applications

Used as an inexpensive diamond simulant in jewelry. The surrounding setting appears to be silver-colored metal, possibly sterling silver, but it also requires testing.

Geological facts

Cubic zirconia is generally heavier and less hard than diamond and may show more rainbow fire. A loupe, refractive-index measurement, thermal/electrical diamond tester, and metal assay are needed for reliable identification.

Field identification & locations

Inspect facet sharpness, inclusions, and wear, then test specific gravity or refractive index; avoid relying on sparkle or photographs. Common synthetic CZ jewelry is widely sold worldwide.