stone
Standard Stone Size and Carat Weight Chart
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.
Estimating Weights for Standard Faceted Cut Diamond
Rounds |
Squares / Princess |
Ovals | |||
Size | Weight | Size | Weight | Size | Weight |
---|---|---|---|---|---|
1.6 mm | .02 carat | 2 mm | .05 carat | 5 x 3 mm | .25 carat |
2 mm | .03 carat | 2.5 mm | .09 carat | 6 x 4 mm | .5 carat |
2.5 mm | .06 carat | 3 mm | .16 carat | 7 x 5 mm | .75 carat |
3 mm | .10 carat | 3.5 mm | .25 carat | 8 x 6 mm | 1.0 carat |
3.5 mm | .16 carat | 4 mm | .33 carat | 9 x 7 mm | 1.5 carat |
4 mm | .25 carat | 4.5 mm | .50 carat | 10 x 8 mm | 2.16 carat |
4.5 mm | .33 carat | 5 mm | .75 carat | 11 x 9 mm | 3.5 carat |
5 mm | .50 carat | 5.5 mm | 1.0 carat | 12 x 10 mm | 4.25 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 | 9.33 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 | 5.5 carat | ||
10 mm | 3.75 carat | 10.5 mm | 6.0 carat | ||
10.5 mm | 4.5 carat | 11 mm | 7.5 carat | ||
11 mm | 5.0 carat | 12 mm | 9.5 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 |
Emerald | Pear | Marquise | |||
Size | Weight | Size | Weight | Size | Weight |
---|---|---|---|---|---|
5 x 3 mm | .33 carat | 3 x 2 mm | .05 carat | 4 x 2 mm | .08 carat |
6 x 4 mm | .625 carat | 4 x 3 mm | .14 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 | .9 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 | .9 carat |
12 x 10 mm | 5.0 carat | 10 x 7 mm | 1.75 carat | 11 X 5.5 mm | 1.12 carat |
14 x 10 mm | 8.5 carat | 11 x 7 mm | 2 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 | 18 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 |
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 |
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.