Rock Identifier
Colorless faceted gemstone, likely cubic zirconia (Synthetic cubic zirconia (ZrO₂), tentative; possibly diamond or synthetic moissanite) — gemstone
gemstone

Colorless faceted gemstone, likely cubic zirconia

Synthetic cubic zirconia (ZrO₂), tentative; possibly diamond or synthetic moissanite

AI-generated identification · may be incorrect

Colorless, transparent, brilliant faceted cut with strong dispersion; crystal structure is cubic for stabilized zirconia. Cubic zirconia has Mohs hardness about 8–8.5 and specific gravity about 5.6–6.0; hardness and identity cannot be confirmed from the photograph alone.

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Physical properties

Colorless, transparent, brilliant faceted cut with strong dispersion; crystal structure is cubic for stabilized zirconia. Cubic zirconia has Mohs hardness about 8–8.5 and specific gravity about 5.6–6.0; hardness and identity cannot be confirmed from the photograph alone.

Formation & geological history

Cubic zirconia is laboratory-grown by melting zirconium oxide with stabilizers, not naturally formed; commercial production began in the 1970s. Diamond and moissanite are alternative possibilities requiring testing.

Uses & applications

Used as an inexpensive diamond simulant in jewelry and ornamentation; occasionally used in technical ceramics. Value is typically modest unless confirmed as a natural diamond or another rare gem.

Geological facts

The image shows a loose, round brilliant-cut stone in a container, with apparent near-colorless clarity and strong sparkle. Faceting pattern, lighting, and size are insufficient for reliable species identification.

Field identification & locations

Check loupe inclusions, facet doubling, thermal/electrical conductivity, refractive index, and specific gravity with a gemologist; do not rely on a basic diamond tester alone. Common commercial sources are China and elsewhere in laboratory production.