Four Ways to Tell the Difference Between CZ and Diamond. 1. The Sharpness of Facet Junctions Test. Many of today’s CZ stones have ‘softer’ facets than diamonds. Try the Huff Test: 2. The Huff Test. Hold the stone in question next to a diamond and “huff” on them with your hot breath. Both stones will fog up.
3. Brilliance: Cubic Zirconia has a higher number on the refractive index, meaning it refracts light faster and so appears more brilliant. Faster refraction is why cubic zirconia looks more like a diamond than white sapphire does. Cubic zirconia measures at 2.15- 2.18 versus white sapphire at approximately 1.76 – 1.77.
While cubic zirconia is measured in carats, each carat of cubic zirconia is actually smaller than a real diamond of the same carat size because cubic zirconia is denser. For cubic zirconia, color, and clarity do not apply. Cubic zirconia is man-made with a different formation process than real diamonds. As such, it’s always colorless and

There are quite a few significant differences between Cubic Zirconia and real diamonds. Diamonds are harder than Cubic Zirconia with a Mohs scale rating of 10 while Cubic Zirconia stones fall between 8.5 to 9.0. Real diamond offers commendable durability whereas CZ being a synthetic gemstone is less durable.

White gold ring with genuine 12.62 carat blue zircon surrounded by 153 diamonds. Cubic zirconia. It is one of the more popular alternatives for a diamond. For chemistry it is zirconium oxide, and it is often used as a synthetic diamond. If you read the initials Cz in the description of a jewel, it is cubic zirconia. The only difference is that lab diamonds are grown inside, well, a lab. They're perfect when you want a natural diamond at a way lower price. Cubic zirconias are easily mistaken for diamonds since they're both white and sparkly. But they're entirely different stones. Cubic zirconia is a good choice if you want a short-term stone that passes off eZT1Q.
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    • cubic zirconia and diamond difference