Emerald-cut Diaspore Size Chart
Carat to mm size chart for emerald-cut Diaspore, from 0.25ct to 40ct (at an L/W ratio of 1.35). The chart is interactive, meaning you can click on any stone to view it directly in the size simulator.
Gem sizes are shown in actual, real-world size, provided your device screen size is in diagonal. If this is not correct, change it here:
Gem sizes are shown in actual, real-world size, provided your device screen size is in diagonal. If this is not correct, change it here:
Actual size is set for screen
Gemstone:
Shape:
Diaspore Size Chart (Emerald Cut)
0.25ct
4.25×3.15 mm
4.25×3.15 mm
0.5ct
5.35×3.96 mm
5.35×3.96 mm
0.75ct
6.13×4.54 mm
6.13×4.54 mm
1ct
6.74×4.99 mm
6.74×4.99 mm
1.25ct
7.26×5.38 mm
7.26×5.38 mm
1.5ct
7.72×5.72 mm
7.72×5.72 mm
1.75ct
8.13×6.02 mm
8.13×6.02 mm
2ct
8.49×6.29 mm
8.49×6.29 mm
2.5ct
9.15×6.78 mm
9.15×6.78 mm
3ct
9.72×7.2 mm
9.72×7.2 mm
3.5ct
10.23×7.58 mm
10.23×7.58 mm
4ct
10.71×7.93 mm
10.71×7.93 mm
4.5ct
11.12×8.24 mm
11.12×8.24 mm
5ct
11.53×8.54 mm
11.53×8.54 mm
5.5ct
11.89×8.81 mm
11.89×8.81 mm
6ct
12.24×9.07 mm
12.24×9.07 mm
6.5ct
12.58×9.32 mm
12.58×9.32 mm
7ct
12.89×9.55 mm
12.89×9.55 mm
7.5ct
13.19×9.77 mm
13.19×9.77 mm
8ct
13.49×9.99 mm
13.49×9.99 mm
8.5ct
13.76×10.19 mm
13.76×10.19 mm
9ct
14.03×10.39 mm
14.03×10.39 mm
9.5ct
14.28×10.58 mm
14.28×10.58 mm
10ct
14.53×10.76 mm
14.53×10.76 mm
11ct
14.99×11.1 mm
14.99×11.1 mm
12ct
15.43×11.43 mm
15.43×11.43 mm
13ct
15.85×11.74 mm
15.85×11.74 mm
14ct
16.24×12.03 mm
16.24×12.03 mm
15ct
16.62×12.31 mm
16.62×12.31 mm
16ct
16.98×12.58 mm
16.98×12.58 mm
17ct
17.33×12.84 mm
17.33×12.84 mm
18ct
17.67×13.09 mm
17.67×13.09 mm
19ct
17.98×13.32 mm
17.98×13.32 mm
20ct
18.29×13.55 mm
18.29×13.55 mm
22ct
18.89×13.99 mm
18.89×13.99 mm
24ct
19.44×14.4 mm
19.44×14.4 mm
26ct
19.97×14.79 mm
19.97×14.79 mm
28ct
20.47×15.16 mm
20.47×15.16 mm
30ct
20.95×15.52 mm
20.95×15.52 mm
33ct
21.63×16.02 mm
21.63×16.02 mm
36ct
22.26×16.49 mm
22.26×16.49 mm
40ct
23.06×17.08 mm
23.06×17.08 mm
Length-to-width ratio: 1.35, Color:
Download Chart
Note: If you want to cut out the shapes and try them on your finger, print out the PDF chart. The image (png) chart will not print at actual size.
Carat-to-MM Conversion Table
Use this conversion table to quickly convert emerald-cut Diaspore carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 4.25×3.15 mm |
| 0.5 ct | 5.35×3.96 mm |
| 0.75 ct | 6.13×4.54 mm |
| 1 ct | 6.74×4.99 mm |
| 1.25 ct | 7.26×5.38 mm |
| 1.5 ct | 7.72×5.72 mm |
| 1.75 ct | 8.13×6.02 mm |
| 2 ct | 8.49×6.29 mm |
| 2.5 ct | 9.15×6.78 mm |
| 3 ct | 9.72×7.2 mm |
| 3.5 ct | 10.23×7.58 mm |
| 4 ct | 10.71×7.93 mm |
| 4.5 ct | 11.12×8.24 mm |
| 5 ct | 11.53×8.54 mm |
| 5.5 ct | 11.89×8.81 mm |
| 6 ct | 12.24×9.07 mm |
| 6.5 ct | 12.58×9.32 mm |
| 7 ct | 12.89×9.55 mm |
| 7.5 ct | 13.19×9.77 mm |
| 8 ct | 13.49×9.99 mm |
| 8.5 ct | 13.76×10.19 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 14.03×10.39 mm |
| 9.5 ct | 14.28×10.58 mm |
| 10 ct | 14.53×10.76 mm |
| 11 ct | 14.99×11.1 mm |
| 12 ct | 15.43×11.43 mm |
| 13 ct | 15.85×11.74 mm |
| 14 ct | 16.24×12.03 mm |
| 15 ct | 16.62×12.31 mm |
| 16 ct | 16.98×12.58 mm |
| 17 ct | 17.33×12.84 mm |
| 18 ct | 17.67×13.09 mm |
| 19 ct | 17.98×13.32 mm |
| 20 ct | 18.29×13.55 mm |
| 22 ct | 18.89×13.99 mm |
| 24 ct | 19.44×14.4 mm |
| 26 ct | 19.97×14.79 mm |
| 28 ct | 20.47×15.16 mm |
| 30 ct | 20.95×15.52 mm |
| 33 ct | 21.63×16.02 mm |
| 36 ct | 22.26×16.49 mm |
| 40 ct | 23.06×17.08 mm |