gemstone

Colorless faceted gemstone (likely cubic zirconia)

Cubic zirconia, ZrO₂ (synthetic zirconium dioxide); possibly synthetic glass or lab-grown diamond

AI-generated identification · may be incorrect

Oval brilliant cut, colorless, transparent, adamantine-to-glassy luster, strong facet reflections and noticeable fire. Cubic zirconia has Mohs hardness about 8–8.5, cubic crystal structure, no cleavage, and specific gravity about 5.6–6.0; the photograph alone cannot confirm it over diamond or glass.

Identified August 8, 2026More gemstone →

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At a glance

Common name: Colorless faceted gemstone (likely cubic zirconia)
Scientific name: Cubic zirconia, ZrO₂ (synthetic zirconium dioxide); possibly synthetic glass or lab-grown diamond
Category: gemstone
Identified: August 8, 2026
Method: Standard

AI Estimated Value

$1–$30 loose if cubic zirconia; $20–$150 for a larger quality example; substantially higher if confirmed as diamond

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

Almost certainly a human-cut synthetic gem rather than a natural rock. Cubic zirconia is produced by melting zirconium oxide with stabilizing oxides; it has no geological age. The reported Santiago-region location does not materially identify a cut gemstone.

Uses & applications

Commonly used as an inexpensive diamond simulant in jewelry, costume jewelry, and decorative objects. Typical value is modest unless mounted in a valuable setting.

Geological facts

Cubic zirconia is denser and softer than diamond and often shows strong rainbow flashes. A loupe may reveal facet wear or doubling; definitive identification requires refractive index, thermal/electrical testing, or gemological spectroscopy.

Field identification & locations

The regular oval faceting and exceptionally uniform transparency indicate a manufactured gem. Estimated value: $1–$30 loose for ordinary cubic zirconia; roughly $20–$150 for a larger, well-cut example. If confirmed as diamond, value could instead range from hundreds to many thousands of dollars.