CZ "diamond" pendant in gold on silver (2018 model)

Zirconia is the artificially synthesized, cubic crystalline form of zirconium (IV) oxide (ZrO2). The material has optical properties which are closer to the characteristics of diamond than that of any other material as well. It is not easy to distinguish the difference to the human eye. Zirconia is also popular as an imitation diamond. A zirkoniasteen shines a little less than a diamond. On the other hand, this mineral has a larger amount of different colors that sparkle in it (dispersion). There is a difference in hardness and density. Zirconia has a hardness of 8.5 on the Mohs scale. Diamond has hardness 10. Zirconia has a density (specific gravity), which is approximately 75% greater than that of diamond. Just as diamond can be cut in various shapes zirconia. The stone is mechanically polished to match the tolerance of diamond cutting.