| Hearts & Arrows Round Cut MM Size |
Hearts & Arrows Round Cut Approximate Carat Weight |
| 4.0mm |
0.25ctw |
| 4.5mm |
0.33ctw |
| 5.0mm |
0.50ctw |
| 5.5mm |
0.65ctw |
| 6.0mm |
0.80ctw |
| 6.5mm |
1.00ctw |
| 7.0mm |
1.20ctw |
| 7.5mm |
1.50ctw |
| 8.0mm |
1.90ctw |
| 8.25mm |
2.00ctw |
| 8.5mm |
2.20ctw |
| 9.0mm |
2.75ctw |
| 9.5mm |
3.25ctw |
| Old European Round Cut MM Size |
Old European Round Cut Approximate Carat Weight |
| 5.0mm |
0.50ctw |
| 5.5mm |
0.60ctw |
| 6.0mm |
0.80ctw |
| 6.5mm |
1.00ctw |
| 7.0mm |
1.25ctw |
| 7.5mm |
1.60ctw |
| 8.0mm |
1.90ctw |
| 8.5mm |
2.40ctw |
| 9.0mm |
2.90ctw |
| 9.5mm |
3.50ctw |
| 10mm |
3.90ctw |
| Round Rose Cut MM Size |
Round Rose Cut Approximate Carat Weight |
| 6.5mm |
0.60ctw |
| 7.0mm |
0.85ctw |
| 7.5mm |
1.10ctw |
| 8.0mm |
1.40ctw |
| 8.5mm |
1.80ctw |
| 9mm |
2.00ctw |
