How Does CZ Compare to Diamond?
The overall brilliance and fire of quality CZ stones is equal to that of diamond to the untrained eye. Cubic zirconia can be evaluated using the same qualities that diamonds and other gemstones are graded by: the Four Cs (color, clarity, cut and carat weight). Cubic Zirconia is a virtually flawless equivalent to a diamond on the clarity chart. CZ can be made entirely colorless, equivalent to a perfect score on the color grading scale of diamonds. The biggest difference is that cubic zirconia is 70% heavier than diamond. CZ is extremely durable with a hardness rating of 8.5 compared to 10 for diamond.