Cubic Zirconia (in Jewelry)

Physical Properties

Hardness: 8.0–8.5 Mohs scale; Color: Colorless (in this specimen); Luster: Adamantine; Crystal Structure: Cubic; Cleavage: None; Specific Gravity: 5.6–6.0.

Formation & Geological History

Primary cubic zirconia is synthesized in laboratories using the 'skull melt' process where zirconium oxide powder is heated by radio-frequency induction. Natural baddeleyite exists but is extremely rare and rarely cubic.

Uses & Applications

Predominantly used as a low-cost diamond simulant in jewelry, as well as in industrial laser components and high-temperature ceramics.

Geological Facts

Cubic zirconia was first discovered as a natural mineral in 1937 but wasn't successfully synthesized for the jewelry market until the 1970s by Soviet scientists.

Field Identification & Locations

Identify by its high dispersion (rainbow flashes) which is stronger than a diamond's, and its weight; a CZ will feel much heavier than a same-sized diamond due to higher density.

Identified on: 4/23/2026

Mode: Standard