Characteristics of Cubic Zirconia and Diamond
CZ displays a slightly less brilliance or sparkle than diamond.
CZ displays more fire or flashes of rainbow color than diamond.
CZ is slightly less hard as diamond and both scratch glass.
CZ is a thermal insulator and diamond is thermal conductor.
CZ has a higher density than diamond weighing 75% more.

Most gemologists measure cubic zirconia in millimeters rather than carat weight.
For example, a 6.5 mm CZ is equal to one carat diamond.
A CZ of this size would weigh 1.75 carats.
Cubic zirconia crystals perfect in structure and have no feathers or inclusions.
Imperfect crystal formations are simply discarded.
CZ is cut using the same proportions and intensively precise faceting as the finest diamond.