Natural Cubic Zerconia Pear shape 2.95ct

 Natural Mind Cubic Zerconia

Pear shape

Ice white i color

Weight 2.95ct

There are a few key features of cubic zirconia which distinguish it from diamond:

 

One face of an uncut octahedral diamond, showing trigons (of positive and negative relief) formed by naturalchemical etching

• Hardness: cubic zirconia has a rating of approximately 8 on Mohs hardness scale vs. a rating of 10 for diamond.^[1]
• Specific gravity: the density of cubic zirconia is about 1.7 times that of diamond.
• Refractive index: cubic zirconia has a refractive index of 2.15–2.18, compared to a diamond's 2.42.
• Dispersion is very high at 0.058–0.066, exceeding a diamond's 0.044.
• Cut: cubic zirconia gemstones may be cut differently from diamonds. The facet edges can be rounded or "smooth".
• Color: only the rarest of diamonds are truly colorless, most having a tinge of yellow or brown to some extent. By comparison, a cubic zirconia is often entirely colorless: equivalent to a perfect "D" on diamond's color grading scale. Other desirable colors of cubic zirconia can be produced including near colorless, yellow, pink, purple, green, and even multicolored.
• Thermal conductivity: cubic zirconia is a thermal insulator while diamond is one of the most efficient thermal conductors, with the thermal conductivity exceeding that of most metals. This allows diamond to be distinguished from cubic zirconia with the right instruments.