Since the varying densities of different stone materials and also the varying depths of different cutting styles can result in a significantly different, even between stones with a similar carat weight.Â
Estimating Weights for Standard Faceted Cut Diamond
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Rounds |
Squares / Princess
|
Ovals |
Size |
Weight |
Size |
Weight |
Size |
Weight |
1.6 mm |
.02 carat |
2 mm |
.05Â carat |
5 x 3 mm |
.25 carat |
2 mm |
.03 carat |
2.5 mm |
.09Â carat |
6 x 4 mm |
.5 carat |
2.5 mm |
.06 carat |
3 mm |
.16 carat |
7 x 5 mm |
.75Â carat |
3 mm |
.10 carat |
3.5 mm |
.25 carat |
8 x 6 mm |
1.0 carat |
3.5 mm |
.16 carat |
4 mm |
.33Â carat |
9 x 7 mm |
1.5Â carat |
4 mm |
.25 carat |
4.5 mm |
.50 carat |
10 x 8 mm |
2.16Â carat |
4.5 mm |
.33 carat |
5 mm |
.75 carat |
11 x 9 mm |
3.5Â carat |
5 mm |
.50 carat |
5.5 mm |
1.0 carat |
12 x 10 mm |
4.25Â carat |
5.5 mm |
.62 carat |
6 mm |
1.25 carat |
14 x 10 mm |
6.0 carat |
6 mm |
.75 carat |
6.5 mm |
1.5 carat |
14 x 12 mm |
8.0 carat |
6.5 mm |
1.0 carat |
7 mm |
2.0 carat |
16 x 12 mm |
9.33Â carat |
7 mm |
1.25 carat |
7.5 mm |
2.5 carat |
18 x 13 mm |
14.2 carat |
7.5 mm |
1.62 carat |
8 mm |
3.0 carat |
|
|
8 mm |
2.0 carat |
8.5 mm |
3.75 carat |
|
|
8.5 mm |
2.33 carat |
9 mm |
4.0 carat |
|
|
9 mm |
2.9 carat |
9.5 mm |
5.0 carat |
|
|
9.5mm |
3.25 carat |
10 mm |
5.5Â carat |
|
|
10 mm |
3.75 carat |
10.5 mm |
6.0 carat |
|
|
10.5 mm |
4.5 carat |
11 mm |
7.5Â carat |
|
|
11 mm |
5.0 carat |
12 mm |
9.5Â carat |
|
|
11.5 mm |
5.375 carat |
13 mm |
13.2 carat |
|
|
12 mm |
6.125 carat |
14 mm |
16.5 carat |
|
|
13 mm |
7.75 carat |
15 mm |
20.25 carat |
|
|
14 mm |
9.75 carat |
16 mm |
24.6 carat |
|
|
15 mm |
11.85 carat |
|
|
|
|
16 mm |
16 carat |
|
|
|
|
17 mm |
17.25 carat |
|
|
|
|
8 mm |
20.5 carat |
|
|
|
|
19 mm |
24.0 carat |
|
|
|
|
20 mm |
28.0 carat |
|
|
|
|
21 mm |
34.8 carat |
|
|
|
|
22 mm |
41.8 carat |
|
|
|
|
Â
Emerald |
Pear |
Marquise |
Size |
Weight |
Size |
Weight |
Size |
Weight |
5 x 3 mm |
.33 carat |
3 x 2 mm |
.05Â carat |
4 x 2 mm |
.08 carat |
6 x 4 mm |
.625 carat |
4 x 3 mm |
.14Â carat |
5 x 2.5 mm |
.15 carat |
7 x 5 mm |
1.25 carat |
5 x 3 mm |
.2 carat |
5 x 3 mm |
.20 carat |
8 x 6 mm |
1.75 carat |
6 x 4 mm |
.33 carat |
6 x 3 mm |
.25 carat |
9 x 7 mm |
2.5 carat |
7 x 5 mm |
.5 carat |
8 x 4 mm |
.50 carat |
10 x 8 mm |
3.75 carat |
8 x 5 mm |
.9Â carat |
9 x 5 mm |
.75 carat |
11 x 9 mm |
4.75 carat |
9 x 6 mm |
1.5 carat |
10 x 5 mm |
.9Â carat |
12 x 10 mm |
5.0 carat |
10 x 7 mm |
1.75Â carat |
11 X 5.5 mm |
1.12 carat |
14 x 10 mm |
8.5Â carat |
11 x 7 mm |
2Â carat |
12 x 6 mm |
2.0 carat |
14 x 12 mm |
9.0 carat |
12 x 8 mm |
3.0 carat |
14 x 7 mm |
3.0 carat |
16 x 12 mm |
10.5 carat |
13 x 9 mm |
3.5 carat |
16 x 8 mm |
4.0 carat |
18 x 13 mm |
14.2 carat |
15 x 10 mm |
5 carat |
18 x 9 mm |
6.0 carat |
20 x 15 mm |
20.3 carat |
16 x 12 mm |
8.6 carat |
20 x 10 mm |
8.5 carat |
25 x 18 mm |
52.2 carat |
18 x 12 mm |
9.3 carat |
|
|
25 x 18 mm |
30.6 carat |
20 x 15 mm |
18Â carat |
|
|
30 x 22 mm |
54.5 carat |
22 x 16 mm |
23 carat |
|
|
|
|
23 x 17 mm |
25 carat |
|
|
|
|
25 x 18mm |
27 carat |
|
|
|
|
27 x 20mm |
30 carat |
|
|
|
|
30 x 22mm |
34 carat |
|
|
Â
Cushion |
Heart |
Asscher |
Size |
Weight |
Size |
Weight |
Size |
Weight |
4 x 4 mm |
.375 carat |
4 x 4 mm |
.25 carat |
3 x 3 mm |
.16 carat |
4.5 x 4.5 mm |
.5 carat |
5 x 5 mm |
.5 carat |
3.5 x 3.5 mm |
.25 carat |
5 x 5 mm |
.625 carat |
6 x 6 mm |
.75 carat |
4 x 4 mm |
.33 carat |
5.5 x 5.5 mm |
.75 carat |
6.5 x& 6..5 mm |
1.0 carat |
4.5 x 4.5 mm |
.5 carat |
6 x 6 mm |
1.25 carat |
7 x 7 mm |
1.5 carat |
5 x 5 mm |
.75 carat |
6.5 x 6..5 mm |
1.5 carat |
8 x 8 mm |
2.0 carat |
5.5 x 5.5 mm |
1.0 carat |
7 x 7 mm |
2.0 carat |
9 x 9 mm |
3.0 carat |
5.9 x 5.9 mm |
1.33 carat |
8 x 6 mm |
2.0 carat |
10 x 10 mm |
4.0 carat |
6 x 6 mm |
1.25 carat |
8 x 8 mm |
2.9 carat |
11 x 11 mm |
5.0 carat |
6.25 x 6.25 mm |
1.37 carat |
9 x 7 mm |
2.5 carat |
12 x 12 mm |
5.66 carat |
6.5 x 6.5mm |
1.5 carat |
10 x 8 mm |
4.0 carat |
15 x 15 mm |
10.75 carat |
6.6 x 6.6 mm |
1.75 carat |
12 x 10 mm |
7.5 carat |
16 x 16 mm |
13.25 carat |
7 x 7 mm |
2.0 carat |
14 x 10 mm |
9.5 carat |
18 x 18 mm |
15.33 carat |
8 x 8 mm |
3.0 carat |
Â
Trillion |
|
Size |
Weight |
Size |
Weight |
2 x 2 x 2 mm |
0.04 carat |
|
|
3 x 3 x 3mm |
0.06 carat |
|
|
3.5 x 3.5 x 3.5mm |
0.125 carat |
|
|
4 x 4 x 4mm |
0.1666 carat |
|
|
4.5 x 4.5 x 4.5mm |
0.2 carat |
|
|
5 x 5 x 5mm |
0.333 carat |
|
|
5.5 x 5.5 x 5.5mm |
0.375 carat |
|
|
6 x 6 x 6mm |
0.5 carat |
|
|
Most mass-produced jewelry settings come in standard stone sizes.
If your gemstone does not fit in a standard setting, you will need to custom made.