Marquise-cut Diaspore Size Chart
Carat to mm size chart for marquise-cut Diaspore, from 0.25ct to 40ct (at an L/W ratio of 2). 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 (Marquise Cut)
0.25ct
6.46×3.23 mm
6.46×3.23 mm
0.5ct
8.14×4.07 mm
8.14×4.07 mm
0.75ct
9.32×4.66 mm
9.32×4.66 mm
1ct
10.26×5.13 mm
10.26×5.13 mm
1.25ct
11.06×5.53 mm
11.06×5.53 mm
1.5ct
11.74×5.87 mm
11.74×5.87 mm
1.75ct
12.36×6.18 mm
12.36×6.18 mm
2ct
12.94×6.47 mm
12.94×6.47 mm
2.5ct
13.94×6.97 mm
13.94×6.97 mm
3ct
14.8×7.4 mm
14.8×7.4 mm
3.5ct
15.58×7.79 mm
15.58×7.79 mm
4ct
16.3×8.15 mm
16.3×8.15 mm
4.5ct
16.94×8.47 mm
16.94×8.47 mm
5ct
17.56×8.78 mm
17.56×8.78 mm
5.5ct
18.12×9.06 mm
18.12×9.06 mm
6ct
18.66×9.33 mm
18.66×9.33 mm
6.5ct
19.16×9.58 mm
19.16×9.58 mm
7ct
19.64×9.82 mm
19.64×9.82 mm
7.5ct
20.1×10.05 mm
20.1×10.05 mm
8ct
20.52×10.26 mm
20.52×10.26 mm
8.5ct
20.94×10.47 mm
20.94×10.47 mm
9ct
21.36×10.68 mm
21.36×10.68 mm
9.5ct
21.74×10.87 mm
21.74×10.87 mm
10ct
22.12×11.06 mm
22.12×11.06 mm
11ct
22.82×11.41 mm
22.82×11.41 mm
12ct
23.5×11.75 mm
23.5×11.75 mm
13ct
24.14×12.07 mm
24.14×12.07 mm
14ct
24.74×12.37 mm
24.74×12.37 mm
15ct
25.32×12.66 mm
25.32×12.66 mm
16ct
25.86×12.93 mm
25.86×12.93 mm
17ct
26.4×13.2 mm
26.4×13.2 mm
18ct
26.9×13.45 mm
26.9×13.45 mm
19ct
27.38×13.69 mm
27.38×13.69 mm
20ct
27.86×13.93 mm
27.86×13.93 mm
22ct
28.76×14.38 mm
28.76×14.38 mm
24ct
29.6×14.8 mm
29.6×14.8 mm
26ct
30.4×15.2 mm
30.4×15.2 mm
28ct
31.16×15.58 mm
31.16×15.58 mm
30ct
31.9×15.95 mm
31.9×15.95 mm
33ct
32.92×16.46 mm
32.92×16.46 mm
36ct
33.9×16.95 mm
33.9×16.95 mm
40ct
35.1×17.55 mm
35.1×17.55 mm
Length-to-width ratio: 2, 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 marquise-cut Diaspore carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 6.46×3.23 mm |
| 0.5 ct | 8.14×4.07 mm |
| 0.75 ct | 9.32×4.66 mm |
| 1 ct | 10.26×5.13 mm |
| 1.25 ct | 11.06×5.53 mm |
| 1.5 ct | 11.74×5.87 mm |
| 1.75 ct | 12.36×6.18 mm |
| 2 ct | 12.94×6.47 mm |
| 2.5 ct | 13.94×6.97 mm |
| 3 ct | 14.8×7.4 mm |
| 3.5 ct | 15.58×7.79 mm |
| 4 ct | 16.3×8.15 mm |
| 4.5 ct | 16.94×8.47 mm |
| 5 ct | 17.56×8.78 mm |
| 5.5 ct | 18.12×9.06 mm |
| 6 ct | 18.66×9.33 mm |
| 6.5 ct | 19.16×9.58 mm |
| 7 ct | 19.64×9.82 mm |
| 7.5 ct | 20.1×10.05 mm |
| 8 ct | 20.52×10.26 mm |
| 8.5 ct | 20.94×10.47 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 21.36×10.68 mm |
| 9.5 ct | 21.74×10.87 mm |
| 10 ct | 22.12×11.06 mm |
| 11 ct | 22.82×11.41 mm |
| 12 ct | 23.5×11.75 mm |
| 13 ct | 24.14×12.07 mm |
| 14 ct | 24.74×12.37 mm |
| 15 ct | 25.32×12.66 mm |
| 16 ct | 25.86×12.93 mm |
| 17 ct | 26.4×13.2 mm |
| 18 ct | 26.9×13.45 mm |
| 19 ct | 27.38×13.69 mm |
| 20 ct | 27.86×13.93 mm |
| 22 ct | 28.76×14.38 mm |
| 24 ct | 29.6×14.8 mm |
| 26 ct | 30.4×15.2 mm |
| 28 ct | 31.16×15.58 mm |
| 30 ct | 31.9×15.95 mm |
| 33 ct | 32.92×16.46 mm |
| 36 ct | 33.9×16.95 mm |
| 40 ct | 35.1×17.55 mm |