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 | ||||