Conversion Charts
conversion 1 
conversion 2 conversion 3
| Chart 4 |
Emerald Cut Stones
|
|
|
Carat to mm
|
|
|
Carat Weight
|
mm Size
|
|
|
0.20
|
4 x 3
|
|
0.25
|
5 x 3
|
|
0.50
|
6 x 4
|
|
0.75
|
6.5 x 4.5
|
|
1.00
|
7 x 5
|
|
1.50
|
8 x 6
|
|
2.00
|
8.5 x 6.5
|
|
2.50
|
9 x 7
|
|
3.00
|
10 x 8
|
|
4.00
|
11 x 9
|
|
5.00
|
12 x 10
|
|
| Chart 5 |
Round Gem Stones (Brilliant)
|
|
|
Carat Weight
|
mm Size
|
Carat Weight
|
mm Size
|
Carat Weight
|
mm Size
|
|
|
0.005
|
1.0
|
0.17
|
3.6
|
1.33
|
7.2
|
|
|
0.01
|
1.3
|
0.18
|
3.7
|
1.50 - 1.75
|
7.5
|
|
0.015
|
1.5
|
0.20
|
3.8
|
1.75
|
7.8
|
|
0.02
|
1.7
|
0.22
|
3.9
|
2.00
|
8.0
|
|
0.025
|
1.8
|
0.25
|
4.0
|
2.15
|
8.4
|
|
0.03
|
2.0
|
0.30
|
4.2
|
2.25
|
8.6
|
|
0.035
|
2.1
|
0.33
|
4.4
|
2.50 - 3.00
|
9.0
|
|
0.04
|
2.2
|
0.35
|
4.5
|
3.00
|
9.4
|
|
0.05
|
2.4
|
0.38
|
4.6
|
3.15
|
9.6
|
|
0.06
|
2.5
|
0.40
|
4.8
|
3.35
|
9.8
|
|
0.07
|
2.7
|
0.50
|
5.0
|
3.50
|
10.0
|
|
0.08
|
2.8
|
0.60
|
5.4
|
3.75
|
10.2
|
|
0.09
|
2.9
|
0.63
|
5.5
|
4.00
|
10.4
|
|
0.10
|
3.0
|
0.65
|
5.6
|
4.25
|
10.6
|
|
0.11
|
3.1
|
0.75
|
6.0
|
4.50
|
10.8
|
|
0.12
|
3.2
|
0.95
|
6.4
|
4.75
|
11.0
|
|
0.14
|
3.3
|
1.00
|
6.6
|
5.00
|
11.2
|
|
0.15
|
3.4
|
1.17
|
6.8
|
6.00 - 7.00
|
12.0
|
|
0.16
|
3.5
|
1.25
|
7.0
|
|
|
|
| Chart 6 |
Triangular Gem Stones
|
|
|
Carat to mm
|
|
|
Carat Weight
|
mm Size
|
|
|
0.50
|
4 x 4 x 4
|
|
0.75
|
5 x 5 x 5
|
|
1.00
|
6 x 6 x 6
|
|
1.50
|
7 x 7 x 7
|
|
2.00
|
8 x 8 x 8
|
|
2.50
|
9 x 9 x 9
|
|
3.00
|
10 x 10 x 10
|
| Carat Weight |
mm Size |
|
| 0.20 |
4 x 3 |
 |
| 0.25 |
5 x 3 |
| 0.33 |
5 x 3.5 |
| 0.40 |
5 x 4 |
| 0.50 |
6 x 4 |
| 0.65 |
6.5 x 4.5 |
| 0.75 |
7 x 5 |
| 1.00 |
7.5 x 5.5 |
| 1.25 |
8 x 6 |
| 1.50 |
8.5 x 6.5 |
| 1.75 |
9 x 6 |
| 2.00 |
9 x 7 |
| 2.50 |
9.5 x 7.5 |
| 3.00 |
10 x 8 |
| 3.50 |
10 x 8.5 |
| 4.00 |
11 x 9 |
| 4.50 |
11 x 9.5 |
| 5.00 |
12 x 10 |
|
|
|
| Chart 8 |
Princess Cut Stones
|
|
| Carat Weight |
mm Size |
|
| 0.06 |
2.0 |
 |
| 0.08 |
2.25 |
| 0.10 |
2.5 |
| 0.13 |
2.75 |
| 0.15 |
3.0 |
| 0.20 |
3.25 |
| 0.23 |
3.5 |
| 0.25 |
3.75 |
| 0.30 |
4.0 |
| 0.35 |
4.42 |
| 0.40 |
4.5 |
| 0.50 |
4.75 |
| 0.63 |
5.0 |
| 0.75 |
5.25 |
| 1.00 |
5.5 |
| 1.25 |
6.0 |
| 1.60 |
7.0 |
| 2.25 |
8.0 |
|
|
|
| Chart 9 |
Pear shape Stones
|
|
| Carat Weight |
mm Size |
|
| 0.20 |
4 x 2 |
 |
| 0.30 |
5 x 3 |
| 0.50 |
6 x 4 |
| 0.75 |
7 x 5 |
| 1.00 |
8 x 5 |
| 1.50 |
9 x 6 |
| 2.00 |
10 x 7 |
| 2.50 |
12 x 7 |
| 3.00 |
12 x 8 |
| 3.50 |
13 x 8 |
| 4.00 |
14 x 8 |
| 5.00 |
15 x 9 |
| Chart 10 |
Heart shape Stones
|
|
| Carat Weight |
mm Size |
|
| 0.25 |
4 x 4 |
 |
| 0.50 |
5 x 5 |
| 0.65 |
5.5 x 5.5 |
| 0.75 |
6 x 6 |
| 1.00 |
6.5 x 6.5 |
| 1.50 |
7 x 7 |
| 2.00 |
8 x 8 |
| 2.50 |
8.5 x 8.5 |
| 3.00 |
9 x 9 |
| 3.50 |
9.5 x 9.5 |
| 4.00 |
10 x 10 |
| 4.50 |
10.5 x 10.5 |
| 5.00 |
11 x 11 |
| Chart 11 |
Marquise Cut Stones
|
|
| Carat Weight |
mm Size |
Carat Weight |
mm Size |
|
| 0.07 |
3.5 x 1.5 |
0.85 |
9.5 x 4.5 |
 |
| 0.10 |
4 x 2 |
1.00 |
10.4 x 4.75 |
| 0.20 |
5 x 2 |
1.00 - 1.25 |
10 x 5 |
| 0.20 - 0.25 |
5 x 3 |
1.50 |
11 x 5 |
| 0.25 |
5.5 x 2.5 |
1.50 - 1.75 |
11 x 5.5 |
| 0.30 |
6 x 3 |
2.00 |
12 x 6 |
| 0.35 |
7 x 3 |
2.50 |
13 x 5.5 |
| 0.38 |
7 x 3.5 |
2.50 - 2.75 |
13 x 6 |
| 0.40 |
7 x 4 |
2.75 - 3.00 |
14 x 6.5 |
| 0.50 |
8 x 4 |
3.00 |
14 x 7 |
| 0.65 |
8.5 x 4.5 |
3.50 - 4.00 |
15 x 7 |
| 0.70 |
9 x 4 |
4.50 |
16 x 8 |
| 0.75 |
9 x 4.5 |
7.00 |
18 x 9 |
| 0.80 |
9 x 5 |
10.00 |
20 x 10 |
