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Cubic zirconia vs. diamonds
Jul 30, 2018

Cubic zirconia vs. diamonds

Overall, cubic zirconia is less expensive jewelry and manufactured, where a diamond is a naturally occurring substance that is very expensive.

There are some ways to distinguish cubic zirconia from a diamond as follows:

  • Thermal conductivity: Diamonds are thermal conductors while cubic zirconia is a thermal insulator. This is what makes the diamond stand out next to the cubic zirconia with special instruments.

  • Hardness: Diamond has a rating of 10 and Cubic zirconia has an 8 on the Mohs hardness scale.

  • Density: Cubic zirconia is 1.7 times denser than a diamond.

  • Refractive index: Diamond has a refractive index of 2.42 vs. Cubic Zirconia has an index of 2.15-2.18

  • Cut: Diamonds are typically cut differently than cubic zirconia gemstones.

  • Dispersion: Diamond 0.044 vs. cubic zirconia 0.058-0.066

  • Color: Cubic zirconia is equivalent to the perfect “D” on diamond’s grading scale but it also comes in other colors as well, such as green, orange and pink, etc. Most diamonds on the other hand have a brown or yellow tinge to them, and only the rarest are truly colorless with diamonds.



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