| Chart A |
|
| *Diamond Carat |
Tolerance Range |
| 1/10 |
0.07 - 0.11 |
| 1/8 |
0.12 - 0.16 |
| 1/5 |
0.17 - 0.22 |
| 1/4 |
0.23 0.28 |
| 1/3 |
0.29 - 0.34 |
| 3/8 |
0.35 - 0.39 |
| 2/5 |
0.40 - 0.45 |
| 1/2 |
0.46 - 0.53 |
| 5/8 |
0.54 - 0.62 |
| 2/3 |
0.63 - 0.72 |
| 3/4 |
0.73 - 0.81 |
| 7/8 |
0.82 - 0.92 |
| 1 |
0.93 - 1.04 |
| 1 1/8 |
1.05 - 1.17 |
| 1 1/4 |
1.18 - 1.30 |
|
| Chart B |
|
| *Diamond Carat |
Minimum Carat |
| 1/20 |
.04 |
| 1/10 |
.09 |
| 1/8 |
.11 |
| 1/6 |
.14 |
| 1/5 |
.18 |
| 1/4 |
.23 |
| 1/3 |
.29 |
| 3/8 |
.37 |
| 1/2 |
.45 |
| 5/8 |
.60 |
| 3/4 |
.66 |
| 7/8 |
.84 |
| 9/10 |
.90 |
| 1 |
.96 |
| 1 1/8 |
1.10 |
| 1 1/6 |
1.14 |
| 1 1/5 |
1.18 |
| 1 1/4 |
1.23 |
| 1 1/3 |
1.29 |
| 1 3/8 |
1.37 |
| 1 1/2 |
1.45 |
| 1 5/8 |
1.60 |
| 1 3/4 |
1.66 |
| 1 7/8 |
1.84 |
| 1 9/10 |
1.90 |
| 2 |
1.96 |
| 2 1/8 |
2.10 |
| 2 1/6 |
2.14 |
| 2 1/5 |
2.18 |
| 2 1/4 |
2.23 |
| 2 1/3 |
2.29 |
| 2 3/8 |
2.37 |
| 2 1/2 |
2.45 |
| 2 5/8 |
2.60 |
| 2 3/4 |
2.66 |
| 2 7/8 |
2.84 |
| 2 9/10 |
2.90 |
| 3 |
2.96 |
|
| Chart C |
|
| *Diamond Carat |
Tolerance Range |
| All sizes |
+ or - 4 to 5% |
|
AJS
Diamond weight charts 
