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| Gemstone Library |
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| AJS Diamonds Weight Chart |
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| Round Diamonds |
|
Round Diamonds |
| width (mm) |
width (inch) |
Weight |
width (mm) |
width (inch) |
Weight |
| 1.0 mm |
.039 inch |
.005 carat |
4.8 mm |
|
.40 carat |
| 1.2 mm |
|
.008 carat |
4.9 mm |
|
.43 carat |
| 1.3 mm |
|
.01 carat |
5.0 mm |
.197 inch |
.47 carat |
| 1.5 mm |
|
.015 carat |
5.2 mm |
.205 inch |
1/2 carat |
| 1.7 mm |
|
.02 carat |
5.4 mm |
|
.60 carat |
| 1.8 mm |
|
.025 carat |
5.5 mm |
|
.63 carat |
| 2.0 mm |
.079 inch |
.03 carat |
5.6 mm |
|
.65 carat |
| 2.1 mm |
|
.035 carat |
5.8 mm |
.228 inch |
3/4 carat |
| 2.2 mm |
|
.04 carat |
6.0 mm |
.236 inch |
.80 carat |
| 2.4 mm |
|
.05 carat |
6.2 mm |
|
.85 carat |
| 2.5 mm |
|
.06 carat |
6.4 mm |
|
.95 carat |
| 2.7 mm |
|
.07 carat |
6.5 mm |
.255 inch
or 1/4 inch |
1.00 carat |
| 2.8 mm |
|
.08 carat |
6.6 mm |
|
1.10 carat |
| 2.9 mm |
|
.09 carat |
6.8 mm |
|
1.17 carat |
| 3.0 mm |
.118 inch |
1/10 carat |
7.0 mm |
.276 inch |
1-1/4 carat |
| 3.1 mm |
|
.11 carat |
7.2 mm |
|
1.33 carat |
| 3.2 mm |
.125 inch
or 1/8 inch |
.12 carat |
7.4 mm |
.291 inch |
1-1/2 carat |
| 3.3 mm |
|
.14 carat |
7.6 mm |
|
1.60 carat |
| 3.4 mm |
|
.15 carat |
7.8 mm |
.307 inch |
1.75 carat |
| 3.5 mm |
|
.16 carat |
8.0 mm |
.315 inch |
1.90 carat |
| 3.6 mm |
|
.17 carat |
8.2 mm |
323 inch |
2.00 carat |
| 3.7 mm |
|
.18 carat |
8.4 mm |
|
2.15 carat |
| 3.8 mm |
.150 inch |
1/5 carat |
8.6 mm |
.338 inch |
2.25 carat |
| 3.9 mm |
|
.22 carat |
8.8 mm |
.346 inch |
2.50 carat |
| 4.0 mm |
.158 inch |
.23 carat |
9.0 mm |
.354 inch |
2.65 carat |
| 4.1 mm |
.162 inch |
1/4 carat |
9.2 mm |
|
2.85 carat |
| 4.2 mm |
|
.30 carat |
9.4 mm |
.370 inch |
3.00 carat |
| 4.4 mm |
.173 inch |
.33 carat |
9.6 mm |
|
3.15 carat |
| 4.5 mm |
|
.35 carat |
9.8 mm |
|
3.35 carat |
| 4.6 mm |
.181 inch |
1/3 carat |
10.0 mm |
.394 inch |
3-1/2 carat |
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