Round
(also applies to European, Mine, Lonestar, Sunburst, and Portuguese)
Size (mm) |
CZ ct wt |
Diamond ct wt |
1.25 |
0.013 |
0.010 |
1.50 |
0.023 |
0.015 |
1.75 |
0.037 |
0.020 |
2.00 |
0.06 |
0.03 |
2.25 |
0.08 |
0.04 |
2.50 |
0.10 |
0.05 |
2.75 |
0.15 |
0.08 |
3.00 |
0.18 |
0.11 |
3.50 |
0.29 |
0.17 |
4.00 |
0.43 |
0.25 |
4.50 |
0.61 |
0.36 |
5.00 |
0.79 |
0.46 |
5.50 |
1.13 |
0.66 |
6.00 |
1.43 |
0.84 |
6.50 |
1.75 |
1.03 |
7.00 |
2.17 |
1.28 |
7.50 |
2.84 |
1.67 |
8.00 |
3.46 |
2.04 |
8.50 |
4.13 |
2.43 |
9.00 |
4.68 |
2.75 |
9.50 |
5.69 |
3.35 |
10.00 |
6.58 |
3.87 |
Princess
(also applies to Quadrillion, Asscher, Flanders, and Cushion)
Size (mm) |
CZ ct wt |
Diamond ct wt |
3.00 |
0.30 |
0.18 |
3.50 |
0.50 |
0.29 |
4.00 |
0.66 |
0.39 |
4.50 |
0.95 |
0.56 |
5.00 |
1.21 |
0.71 |
5.50 |
1.68 |
0.99 |
6.00 |
2.10 |
1.24 |
6.50 |
2.71 |
1.59 |
7.00 |
3.33 |
1.96 |
7.50 |
4.08 |
2.40 |
8.00 |
5.12 |
3.01 |
8.50 |
6.24 |
3.67 |
9.00 |
7.01 |
4.12 |
9.50 |
8.65 |
5.09 |
10.00 |
9.56 |
5.62 |
Heart
Size (mm) |
CZ ct wt |
Diamond ct wt |
4.00 |
0.40 |
0.24 |
4.50 |
0.57 |
0.34 |
5.00 |
0.75 |
0.44 |
5.50 |
1.03 |
0.61 |
6.00 |
1.25 |
0.74 |
6.25 |
1.41 |
0.83 |
6.50 |
1.58 |
0.93 |
7.00 |
1.92 |
1.13 |
7.50 |
2.71 |
1.59 |
8.00 |
2.90 |
1.71 |
9.00 |
4.10 |
2.41 |
10.00 |
5.38 |
3.16 |