Cubic Zirconia (Faceted)

Physical Properties

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

Formation & Geological History

While naturally occurring as the rare mineral Baddeleyite, gemstone cubic zirconia is a synthetic mineral created in labs using the cold crucible method to melt zirconium oxide at high temperatures (2,750 °C).

Uses & Applications

Primarily used as an affordable diamond simulant in jewelry, as well as in industrial manufacturing for precision cutting tools and thermal coatings.

Geological Facts

Cubic zirconia is significantly heavier than diamond; a CZ of the same size as a diamond will weigh about 1.7 times more. It was first synthesized effectively in 1970 by Soviet scientists.

Field Identification & Locations

Identify by its high dispersion (more rainbow flashes than diamond), lack of inclusions, and high density. It will not hold heat as well as a diamond, which is why 'diamond testers' can distinguish them.

Identified on: 4/26/2026

Mode: Standard