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CZ Weight Conversion Chart.

Use the chart below to covert the weight of a Cubic Zirconia Diamond to Carats. (also works for other gemstones) Cubic Zirconia Wedding Ring
For example a Cubic Zirconia is about 75% heavier than diamond. As such, a CZ’s size is referred to in carats only as in comparison to diamonds. CZs are more accurately measured in millimeters, referring to the diameter. *A 6.5mm Cubic Zirconia is equal in size to a one-carat diamond and actually weighs about 1.75 carats

Round gems Cubic Zirconia CZ's Diamond   Round gems Cubic Zirconia CZ's Diamond
Size in mm Weight in Points (100pts = 1 carat)   Size in mm Weight in Points (100pts = 1 carat)
1.25 .013 .01   6.0 1.43 0.84
1.5 .023 .015   6.25 1.58 0.93
1.75 .037 .02   6.5 1.75 1.03
2.0 .06 .03   6.75 2.11 1.24
2.25 .08 .04   7.0 2.17 1.28
2.5 .10 .05   7.25 2.53 1.49
2.75 .15 .08   7.5 2.84 1.67
3.0 .18 .11   7.75 2.97 1.75
3.25 .24 .14   8.0 3.46 2.04
3.5 .29 .17   8.25 3.58 2.11
3.75 .36 .21   8.5 4.13 2.43
4.0 .43 .25   8.75 4.34 2.55
4.25 .48 .28   9.0 4.68 2.75
4.5 .61 .36   9.25 5.18 3.05
4.75 .74 .44   9.5 5.69 3.35
5.0 .79 .46   9.75 6.13 3.61
5.25 .95 .56   10.00 6.58 3.87
5.5 1.13 .66        
5.75 1.30 .76        
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