gemstone

Colorless faceted gemstone, likely cubic zirconia

Synthetic cubic zirconia (zirconium dioxide, ZrO₂); identity is visual and not definitive

AI-generated identification · may be incorrect

Colorless, transparent, brilliant vitreous luster, oval mixed brilliant/step-style faceting, and no visible natural inclusions. Cubic zirconia has Mohs hardness about 8–8.5, cubic crystal structure, density about 5.6–6.0, and no cleavage; its strong fire can resemble diamond.

Identified August 9, 2026More gemstone →

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Physical properties

Formation & geological history

Usually laboratory-grown by melting zirconium oxide with stabilizing oxides; it is synthetic rather than geologically formed. Natural zircon occurs in igneous and metamorphic rocks, but this cut stone appears manufactured.

Uses & applications

Common diamond simulant for costume and affordable jewelry, ornaments, and display pieces. Typical value is low compared with diamond or natural zircon.

Geological facts

The image cannot reliably distinguish cubic zirconia from glass, moissanite, or diamond without testing. Cubic zirconia is generally heavier than diamond of the same size and often shows more obvious rainbow dispersion.

Field identification & locations

Look for facet-edge wear, loupe inclusions, and bubbles; bubbles suggest glass, while a thermal/electrical tester or refractive-index and specific-gravity testing is more reliable. Commonly sold worldwide as loose stones and jewelry components.