As we mentioned earlier, CZ crystals are comparatively much more economical than diamonds, but there is still an excellent variety in the Cost of Cubic Zirconia crystals. The reason for this is that they are graded differently. Although all stones are made with similar compositions with equivalent hardness, their grading system varies. Clarity, for instance, is essential in deciding the stone’s quality and contributes significantly to determining its value. However, you might find some CZ gems that are a bit cloudy with visible imperfections. Apparently, such gems are less valued with lower costs.