Cubic Zirconia vs. Lab Diamond
While cubic zirconia (CZ) and lab diamonds may appear similar to the untrained eye, they differ significantly in composition, value, durability, and other characteristics.
Lab grown diamonds are real diamonds created in a laboratory environment using advanced technology that replicates the natural diamond formation process. They share the same physical, chemical, and optical properties as natural diamonds. Cubic zirconia, on the other hand, is a synthetic material made from zirconium dioxide. It is an entirely different gemstone, crafted to imitate the appearance of a diamond at a fraction of the cost.
*Please note that Brilliant Earth does not carry cubic zirconia.
Difference Between Cubic Zirconia and Lab Grown Diamond
1. Durability
Lab grown diamonds are one of the hardest known materials and score a 10 on the Mohs scale of hardness. CZ is much softer, ranking 8-8.5 on the Mohs scale.
2. Appearance
CZ has a higher dispersion rate than diamonds, giving it a rainbow-like sparkle. While this fire can be eye-catching, it may appear artificial to trained eyes. Lab grown diamonds exhibit a more natural brilliance and scintillation that’s indistinguishable from mined diamonds.
3. Cost
Cubic zirconia is a cost-effective alternative, often priced at a fraction of the cost of lab grown diamonds.
4. Longevity
Lab grown diamonds retain their brilliance and structure with proper care. CZ, while beautiful initially, may lose its luster over time and is much more susceptible to scratches and clouding.
5. Weight
CZ is denser than diamonds, meaning a CZ of the same size will weigh more than a lab grown diamond.