Round Diamond Chart
Size (mm)
Sieve #
Weight
Size (mm)
Sieve #
Weight
0.80 mm
+0000
0.0035 ct
2.2 mm
+8.50
0.0464 ct
0.90 mm
+000
0.0040 ct
 
+8.75
0.0480 ct
1.00 mm
+95
0.0045 ct
2.3 mm
+9.0
0.0540 ct
1.05 mm
+00
0.0050 ct
 
+9.25
0.0550 ct
 
+105
0.0055 ct
2.4 mm
+9.50
0.0618 ct
1.10 mm
+0
0.0063 ct
 
+9.75
0.0630 ct
 
+112.5
0.0069 ct
2.5 mm
+10.0
0.0655 ct
1.15 mm
+1.0
0.0074 ct
 
+10.25
0.0690 ct
 
+1.25
0.0078 ct
2.6 mm
+10.50
0.0726 ct
1.20 mm
+1.50
0.0083 ct
 
+10.75
0.0745 ct
 
+1.75
0.0087 ct
2.7 mm
+11.0
0.0800 ct
1.25 mm
+2.0
0.0091 ct
 
+11.25
0.0850 ct
 
+2.25
0.0096 ct
2.8 mm
+11.50
0.0910 ct
1.30 mm
+2.50
0.0103 ct
 
+11.75
0.0950 ct
 
+2.75
0.0108 ct
2.9 mm
+12.0
0.1020 ct
1.35 mm
+3.0
0.0115 ct
 
+12.25
0.1083 ct
 
+3.25
0.0125 ct
3.0 mm
+12.50
0.1110 ct
1.40 mm
+3.50
0.0135 ct
 
+12.75
0.1150 ct
 
+3.75
0.0140 ct
3.1 mm
+13.0
0.1200 ct
1.45 mm
+4.0
0.0145 ct
 
+13.25
0.1290 ct
+4.25
0.0154 ct
3.2 mm
+13.50
0.1340 ct
1.50 mm
+4.50
0.0159 ct
 
+13.75
0.1417 ct
 
+4.75
0.0165 ct
3.3 mm
+14.0
0.1470 ct
1.55 mm
+5.0
0.0172 ct
 
+14.25
0.1533 ct
 
+5.25
0.0188 ct
3.4 mm
+14.50
0.1580 ct
1.60 mm
+5.50
0.0195 ct
 
+14.75
0.1646 ct
 
+5.75
0.0210 ct
3.5 mm
+15.0
0.1680 ct
1.70 mm
+6.0
0.0215 ct
3.6 mm
+15.5
0.1820 ct
 
+6.25
0.0240 ct
3.7 mm
+16.0
0.1989 ct
1.80 mm
+6.50
0.0267 ct
3.8 mm
+16.5
0.2060 ct
 
+6.75
0.0280 ct
3.9 mm
+17.0
0.2300 ct
1.90 mm
+7.0
0.0305 ct
4.0 mm
+17.5
0.2460 ct
 
+7.25
0.0320 ct
4.1 mm
+18.0
0.2550 ct
2.00 mm
+7.50
0.0347 ct
4.2 mm
+18.5
0.2650 ct
 
+7.75
0.0380 ct
4.3 mm
+19.0
0.3000 ct
2.10 mm
+8.0
0.0417 ct
4.4 mm
+19.5
0.3200 ct
 
+8.25
0.0430 ct
4.5 mm
+20.0
0.3400 ct
             

Princess Diamond Chart
Size (mm)
Weight
Size (mm)
Weight
Size (mm)
Weight
1.2 x 1.2
0.012 ct
2.1 x 1.9
0.049 ct
3.0 x 3.0
0.172 ct
1.2 x 1.1
0.011 ct
2.1 x 1.8
0.046 ct
3.0 x 2.9
0.153 ct
1.3 x 1.3
0.014 ct
2.2 x 2.2
0.064 ct
3.0 x 2.8
0.142 ct
1.3 x 1.2
0.013 ct
2.2 x 2.1
0.060 ct
3.0 x 2.7
0.133 ct
1.4 x 1.4
0.020 ct
2.2 x 2.0
0.057 ct
3.1 x 3.1
0.185 ct
1.4 x 1.3
0.019 ct
2.2 x 1.9
0.053 ct
3.1 x 3.0
0.170 ct
1.4 x 1.2
0.019 ct
2.3 x 2.3
0.074 ct
3.1 x 2.9
0.159 ct
1.4 x 1.1
0.018 ct
2.3 x 2.2
0.070 ct
3.1 x 2.8
0.150 ct
1.5 x 1.5
0.022 ct
2.3 x 2.1
0.066 ct
3.2 x 3.2
0.198 ct
1.5 x 1.4
0.021 ct
2.3 x 2.0
0.060 ct
3.2 x 3.1
0.185 ct
1.5 x 1.3
0.020 ct
2.4 x 2.4
0.085 ct
3.2 x 3.0
0.177 ct
1.5 x 1.2
0.019 ct
2.4 x 2.3
0.078 ct
3.2 x 2.9
0.170 ct
1.6 x 1.6
0.025 ct
2.4 x 2.2
0.073 ct
3.3 x 3.3
0.205 ct
1.6 x 1.5
0.023 ct
2.4 x 2.1
0.068 ct
3.3 x 3.2
0.202 ct
1.6 x 1.4
0.022 ct
2.5 x 2.5
0.097 ct
3.3 x 3.1
0.198 ct
1.6 x 1.3
0.021 ct
2.5 x 2.4
0.089 ct
3.4 x 3.4
0.241 ct
1.7 x 1.7
0.029 ct
2.5 x 2.3
0.083 ct
3.4 x 3.3
0.235 ct
1.7 x 1.6
0.027 ct
2.5 x 2.2
0.077 ct
3.4 x 3.2
0.230 ct
1.7 x 1.5
0.025 ct
2.6 x 2.6
0.110 ct
3.5 x 3.5
0.264 ct
1.7 x 1.4
0.023 ct
2.6 x 2.5
0.100 ct
3.5 x 3.4
0.252 ct
1.8 x 1.8
0.034 ct
2.6 x 2.4
0.092 ct
3.5 x 3.3
0.248 ct
1.8 x 1.7
0.032 ct
2.6 x 2.3
0.086 ct
3.6 x 3.6
0.269 ct
1.8 x 1.6
0.030 ct
2.7 x 2.7
0.123 ct
3.6 x 3.5
0.262 ct
1.8 x 1.5
0.028 ct
2.7 x 2.6
0.110 ct
3.6 x 3.4
0.256 ct
1.9 x 1.9
0.040 ct
2.7 x 2.5
0.102 ct
3.7 x 3.7
0.321 ct
1.9 x 1.8
0.038 ct
2.7 x 2.4
0.095 ct
3.7 x 3.6
0.316 ct
1.9 x 1.7
0.036 ct
2.8 x 2.8
0.136 ct
3.7 x 3.5
0.290 ct
1.9 x 1.6
0.034 ct
2.8 x 2.7
0.123 ct
3.8 x 3.8
0.327 ct
2.0 x 2.0
0.051 ct
2.8 x 2.6
0.114 ct
3.8 x 3.7
0.325 ct
2.0 x 1.9
0.045 ct
2.8 x 2.5
0.106 ct
3.8 x 3.6
0.319 ct
2.0 x 1.8
0.043 ct
2.9 x 2.9
0.149 ct
3.9 x 3.9
0.347 ct
2.0 x 1.7
0.041 ct
2.9 x 2.8
0.136 ct
3.9 x 3.8
0.338 ct
2.1 x 2.1
0.055 ct
2.9 x 2.7
0.126 ct
3.9 x 3.7
0.329 ct
2.1 x 2.0
0.052 ct
2.9 x 2.6
0.118 ct
 
 
               


Table
Carat
MM
Pcs/Ct
Sieve Size
0.46-0.56
5
2
-
0.44-0.46
4.9
2.2
-
0.37-0.43
4.6
2.7
20
0.32-0.36
4.5
3
19.5
0.28-0.31
4.2-4.4
3
19
0.23-0.27
3.9-4.1
4
17.5-18.5
0.18-0.22
3.7-3.9
4-5
15.5-17
0.15-0.17
3.4-3.6
6
14.5-15
0.08-0.14
2.6-3.3
7-14
10.5-14
0.06-0.07
2.5-2.6
16-20
10-10.5
0.05
2.4
20
9
0.04
2.2
25
8.5
0.03
2
33
7.5
0.025
1.9
40
6.5
0.02
1.7-1.8
45-50
6
0.013
1.4
77
4
0.01+
1.3
90-100
3
0.008+
1.2
125
2
0.007
1.1
140
1.5
0.005
1
200
0-00


Weight
Marquise
Pear
Oval
Length
Width
Length
Width
Length
Width
0.2
4.9-6.1
2.7-3.4
4.4-5.3
3.0-3.6
4.3-4.8
3.1-3.4
0.25
5.3-6.7
2.9-3.8
4.8-5.5
3.3-4.0
4.3-5.2
3.3-3.9
0.3
5.6-7.4
3.3-4.0
5.1-6.5
3.6-4.3
4.9-5.7
3.4-4.1
0.4
6.3-8.7
3.4-4.4
5.4-6.8
3.8-4.5
4.8-6.1
3.7-4.5
0.5
6.6-9.3
3.8-4.9
5.8-7.8
4.2-5.0
5.4-6.9
4.0-5.0
0.7
7.5-9.6
4.7-5.2
6.9-7.6
6.9-7.6
6.3-7.4
4.6-5.4
             

Princess Cut
Weight
MM
0.03-0.04
1.6-1.8
0.04-0.05
1.8-2.1
0.05-0.06
1.9-2.2
0.06-0.07
2.1-2.3
0.08-0.14
2.3-2.8
0.15-0.17
2.9-3.2