19 years CZ manufacture Customized CZ stable CZ supply Good CZ quality Fast & safe CZ shipping cubic zirconia stone XDGems Advantage19 years ... are waiting for you. Gemstones Specification Material:Cubic Zirconia(aka CZ), Corundum, Ruby, Sapphire, Spinel, Glass, K9Shape:Round, ... Concave cut.Customized cutting is welcome.CZ Gemstone IntroductionCubic zirconia (or CZ) is the cubic crystalline form of ...