Cubic Zirconia, a.k.a. CZ, is the cubic crystalline form of zirconium dioxide. The natural form of a yellowish monoclinic baddeleyite (zirconium oxide) was discovered in 1892. It is a mineral that is widely synthesized for use as a diamond simulant. It is hard, optically flawless and usually colorless ( It is now made in a variety of colors). Considering its low cost and durability, cubic zirconia has remained the most gemologically and economically important diamond simulant since 1976.
Yellow, Vibrant, Very High Dispersion, Good Brilliance, Good Cut, Good Polish, Very Hard, Man-Made.
Moh's Hardness = 8.5 - >9.
Moh's Hardness = 8.5 - >9.
