Cubic Zirconia

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Round Brilliant-Cut Cubic Zirconia.

Cubic zirconia is a man-made material used to imitate diamond and other gemstones. Commonly referred to as CZ. CZ has a thermal insulating property and diamond is a very efficient thermal conductor, therefore it is easy to separate diamond from CZ with a simple thermal conductivity test like that found in most diamond testers.

There is an extremely rare natural form of Cubic Zirconia but everything used in jewelry production is the man-made variety.

Gemological Information for Cubic Zirconia
Color Colorless, Pink, Red, Yellow, Orange, Blue, Purple, Green and Brown
Crystal Structure Cubic
Refractive Index 2.15
Durability Excellent
Hardness 8.5
Similar Stones Diamond, Zircon, Strotium Titanate, Sphene, Synthetic Rutile, GGG, YAG, Spessartite and Demantoid.
Treatments None
Country of Origin Man-Made
Cubic Zirconia Care
Ultrasonic cleaning Safe
Steam Cleaning Safe
Warm Soapy Water Safe
Chemical Attact No reaction
Light Sensitivity None
Heat Sensitivity Sensitive to High Temperatures
Lang Antiques
Lang Antiques