mineral

Cubic Zirconia

Cubic Zirconia (Zirconium Dioxide, ZrO2)

AI-generated identification · may be incorrect

Hardness: 8.0-8.5 (Mohs scale), Color: Colorless (usually), Luster: Adamantine to sub-adamantine, Crystal Structure: Cubic, Specific Gravity: 5.5-6.0

Hardness: 8

Identified July 6, 2026More mineral →

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Physical properties

Hardness: 8.0-8.5 (Mohs scale), Color: Colorless (usually), Luster: Adamantine to sub-adamantine, Crystal Structure: Cubic, Specific Gravity: 5.5-6.0

Formation & geological history

While naturally occurring as a rare mineral called tazheranite, almost all specimens are lab-grown via the skull melt process, developed primarily in the 1970s.

Uses & applications

Primarily used as a diamond simulant in jewelry, as well as in industrial applications requiring high thermal and chemical resistance such as optical lenses and mechanical parts.

Geological facts

Cubic Zirconia is significantly heavier than diamond (about 1.7 times the weight for the same size) but is more brittle and develops scratches over time.

Field identification & locations

Identified by its high dispersion (rainbow flashes), lack of inclusions under magnification, and its weight relative to size. Unlike diamonds, it acts as a thermal insulator.