Color
Purity
D-E
0
F
1
G
2
H
3
I
4
TTLB
A+
TLB
A
J
5
K
6
L
7
LB
B
Nats
N
VVS
0
0-0
0-1
0-2
01-3
01-4
01-A+
03-A
01-5
02-6
02-7
03-B
VS1
1
1-0
1-1
1-2
VS2
2
2-02
2-3
2-4
23-A+
2-5
SI1
3
3-02
3-3
3-4
3-5
3-6
3-7
SI2
4
4-02
4-3
4-4
45-A+
45-A
45-56
45-7
45-B
SI3
5
5-02
5-3
5-4
56-N
I1
6
6-04
6-A
6-56
6-7
67-B
I2
7
7-04
7-A
7-56
7-7
7-N
I3
8
8-04
8-56
8-7
8-B
8-N

  1. A

    A Quarter Sieves

    Select All
    Select Your Preferences
    Size # Sieve mm Carat Weight Average
    12
     
    2 0.80-0.899 0.850
    12
     
    3 0.75-0.799 0.771
    12
     
    4 0.70-0.749 0.717
    2
     
    2 0.60-0.699 0.640
    2
     
    3 0.50-0.599 0.539
    23
     
    10 +5.00 -0.499 0.487
    23
     
    12 4.90-5.00 0.474
    23
     
    16 4.80-4.90 +0.40 0.416
    3
     
    20 +4.50 -0.399 0.376
    3
     
    22 4.40-4.50 0.331
    3
     
    24 -4.40 +0.30 0.308
    4
     
    26 4.20-4.30 -0.299 0.291
    4
     
    28 4.10-4.20 0.281
    4
     
    30 4.00-4.10 0.255
    4
     
    32 +3.90 +0.24 0.250
    5
     
    34 3.80-3.90 -0.24 0.230
    5
     
    35 3.70-3.80 0.200
    5
     
    36 3.65-3.70 0.193
    5
     
    38 3.60-3.65 +0.18 0.185
    6
     
    40 +15 +3.50 -0.179 0.170
    6
     
    42 14.5-15 3.40-3.50 +0.15 0.154
    6
     
    44 14-14.5 3.30-3.40 0.14-0.149 0.141
    7
     
    46 13.5-14 3.20-3.30 -13.9 0.133
    7
     
    48 13-13.5 3.10-3.20 0.117
    7
     
    50 12.5-13 3.00-3.10 0.107
    7
     
    51 12.25-12.5 2.95-3.00 0.101
    7
     
    52 12-12.25 2.90-2.95 0.096
    7
     
    53 11.5-12 2.80-2.90 +0.09 0.092
    7
     
    54 11.5-12 2.80-2.90 -0.09 0.087
    8
     
    55 11.25-11.5 2.75-2.80 0.082
    8
     
    56 11-11.25 2.70-2.75 0.077
    8
     
    57 10.75-11 2.65-2.70 0.073
    8
     
    58 10.5-10.75 2.60-2.65 0.069
    8
     
    59 10.25-10.5 2.55-2.60 0.066
    8
     
    60 10-10.25 2.50-2.55 0.062
    8
     
    61 9.75-10 2.45-2.50 0.058
    8
     
    62 9.5-9.75 2.40-2.45 0.055
    8
     
    63 9.25-9.5 2.35-2.40 0.051
    8
     
    64 9-9.25 2.30-2.35 0.047
    8
     
    65 8.75-9 2.25-2.30 0.045
    8
     
    66 8.5-8.75 2.20-2.25 0.042
    8
     
    67 8.25-8.5 2.15-2.20 0.039
    8
     
    68 8-8.25 2.10-2.15 0.036
    8
     
    69 7.75-8 2.05-2.10 0.034
    8
     
    70 7.5-7.75 2.00-2.05 0.032
    8
     
    71 7.25-7.5 1.95-2.00 0.030
    8
     
    72 7-7.25 1.90-1.95 0.027
    8
     
    73 6.75-7 1.85-1.90 0.025
    8
     
    74 6.5-6.75 1.80-1.85 0.023
    9
     
    75 6.25-6.5 1.75-1.80 0.021
    9
     
    76 6-6.25 1.70-1.75 0.020
    9
     
    77 5.75-6 1.65-1.70 0.018
    9
     
    78 5.5-5.75 1.60-1.65 0.017
    9
     
    79 5-5.5 1.55-1.60 0.015
    9
     
    80 4.5-5 1.50-1.55 0.014
    9
     
    81 4-4.5 1.45-1.50 0.013
    9
     
    82 3.5-4 1.40-1.45 0.012
    9
     
    83 3-3.5 1.35-1.40 0.011
    9
     
    84 2.5-3 1.30-1.35 0.010
    9
     
    85 2-2.5 1.25-1.30 0.008
    9
     
    86 1.5-2 1.20-1.25 0.007
    9
     
    87 1-1.5 1.15-1.20 0.007
    9
     
    88 0-1 1.10-1.15 0.006
    9
     
    89 00-0 1.05-1.10 0.005
    9
     
    90 00-0 1.00-1.05 0.005
    9
     
    91 000-00 0.95-1.00 0.004
    9
     
    92 000-00 0.90-0.95 0.003
    9
     
    93 -000 -0.90 0.002
  2. B

    B Half Sieves

    Select All
    Select Your Preferences
    Size # Sieve mm Carat Weight Average
    12
     
    2 0.80-0.899 0.850
    12
     
    3 0.75-0.799 0.771
    12
     
    4 0.70-0.749 0.717
    2
     
    2 0.60-0.699 0.640
    2
     
    3 0.50-0.599 0.539
    23
     
    10 +5.00 -0.499 0.487
    23
     
    12 4.90-5.00 0.474
    23
     
    16 4.80-4.90 +0.40 0.416
    3
     
    20 +4.50 -0.399 0.376
    3
     
    22 4.40-4.50 0.331
    3
     
    24 -4.40 +0.30 0.308
    4
     
    26 4.20-4.30 -0.299 0.291
    4
     
    28 4.10-4.20 0.281
    4
     
    30 4.00-4.10 0.255
    4
     
    32 +3.90 +0.24 0.250
    5
     
    34 3.80-3.90 -0.24 0.230
    5
     
    35 3.70-3.80 0.200
    5
     
    36 3.60-3.70 +0.19 0.195
    5
     
    38 3.60-3.70 +0.18 0.185
    6
     
    40 +15 +3.50 -0.179 0.170
    6
     
    42 14.5-15 3.40-3.50 0.158
    6
     
    44 +14 3.30-3.40 +0.14 0.145
    7
     
    46 13.5-14 3.20-3.30 -0.139 0.134
    7
     
    48 13-13.5 3.10-3.20 +0.11 0.120
    7
     
    50 12.5-13 3.00-3.10 -0.109 0.110
    7
     
    51 12.25-12.5 2.95-3.00 0.101
    7
     
    52 12-12.25 2.90-2.95 0.096
    7
     
    53 11.5-12 2.80-2.90 +0.09 0.093
    7
     
    54 11.5-12 2.80-2.90 -0.09 0.850
    8
     
    56 11-11.5 2.70-2.80 0.080
    8
     
    58 10.5-11 2.60-2.70 0.071
    8
     
    60 10-10.5 2.50-2.60 0.064
    8
     
    62 9.5-10 2.40-2.50 0.057
    8
     
    64 9-9.5 2.30-2.40 0.049
    8
     
    66 8.5-9 2.20-2.30 0.043
    8
     
    68 8-8.5 2.10-2.20 0.038
    8
     
    70 7.5-8 2.00-2.10 0.033
    8
     
    72 7-7.5 1.90-2.00 0.028
    8
     
    74 6.5-7 1.80-1.90 0.024
    9
     
    76 6-6.5 1.70-1.80 0.020
    9
     
    78 5.5-6 1.60-1.70 0.017
    9
     
    80 4.5-5.5 1.50-1.60 0.015
    9
     
    82 3.5-4.5 1.40-1.50 0.013
    9
     
    84 2.5-3.5 1.30-1.40 0.010
    9
     
    86 1.5-2.5 1.20-1.30 0.008
    9
     
    88 0-1.5 1.10-1.20 0.006
    9
     
    90 00-0 1.00-1.10 0.005
    9
     
    91 -00 -1.00 0.003
  3. C

    C Whole Sieves Piques

    Select All
    Select Your Preferences
    Size # Sieve mm Carat Weight Average
    12
     
    2 0.80-0.899 0.850
    12
     
    3 0.75-0.799 0.771
    12
     
    4 0.70-0.749 0.717
    2
     
    2 0.60-0.699 0.640
    2
     
    3 0.50-0.599 0.539
    23
     
    10 -0.499 0.487
    23
     
    12 +0.45 0.474
    23
     
    16 0.40-0.449 0.416
    3
     
    20 0.35-0.399 0.375
    3
     
    22 0.33-0.349 0.339
    3
     
    24 0.30-0.329 0.315
    4
     
    28 4.15-4.30 -0.299 0.280
    4
     
    30 4.00-4.15 0.260
    4
     
    32 +3.90 +0.24 0.250
    5
     
    34 3.80-4.00 -0.239 0.217
    5
     
    35 3.70-3.80 0.207
    5
     
    36 3.60-3.70 +0.19 0.195
    5
     
    38 3.60-3.70 +0.18 0.188
    6
     
    40 +15 +3.50 -0.179 0.170
    6
     
    42 14.5-15 3.40-3.50 0.158
    6
     
    44 +14 3.30-3.40 +0.14 0.145
    7
     
    46 13.5-14 3.20-3.30 -0.139 0.134
    7
     
    48 13-13.5 3.10-3.20 +0.11 0.120
    7
     
    51 12.25-13 2.95-3.10 0.105
    7
     
    52 12-12.25 2.90-2.95 0.096
    7
     
    54 11.5-12 2.80-2.90 0.090
    8
     
    56 11-11.5 2.70-2.80 0.080
    8
     
    58 10.5-11 2.60-2.70 0.071
    8
     
    60 10-10.5 2.50-2.60 0.064
    8
     
    62 9.5-10 2.40-2.50 0.057
    8
     
    64 9-9.5 2.30-2.40 0.049
    8
     
    66 8.5-9 2.20-2.30 0.043
    8
     
    68 8-8.5 2.10-2.20 0.038
    8
     
    70 7.5-8 2.00-2.10 0.033
    8
     
    72 7-7.5 1.90-2.00 0.028
    8
     
    74 6.5-7 1.80-1.90 0.024
    9
     
    76 6-6.5 1.70-1.80 0.020
    9
     
    78 5.5-6 1.60-1.70 0.017
    9
     
    80 4.5-5.5 1.50-1.60 0.015
    9
     
    82 3.5-4.5 1.40-1.50 0.013
    9
     
    84 2.5-3.5 1.30-1.40 0.010
    9
     
    86 1.5-2.5 1.20-1.30 0.008
    9
     
    88 0-1.5 1.10-1.20 0.006
    9
     
    90 00-0 1.00-1.10 0.005
    9
     
    91 -00 -1.00 0.003
  4. D

    D Whole Sieves CLNS

    Select All
    Select Your Preferences
    Size # Sieve mm Carat Weight Average
    12
     
    2 0.75-0.899 0.825
    12
     
    3 0.70-0.749 0.725
    2
     
    2 0.60-0.699 0.650
    2
     
    3 0.475-0.599 0.530
    23
     
    12 0.45-0.474 0.460
    23
     
    16 0.40-0.449 0.420
    3
     
    2 0.35-0.399 0.375
    3
     
    3 0.29-0.349 0.320
    4
     
    30 +17.5 4.00-4.30 0.270
    4
     
    32 -17.5 3.90-4.00 0.240
    5
     
    36 +16 3.70-3.90 0.215
    5
     
    38 -16 3.60-3.70 0.190
    6
     
    42 +14.5 3.40-3.60 0.165
    6
     
    44 +14-14.5 3.30-3.40 0.145
    7
     
    48 +13-14 3.10-3.30 0.125
    7
     
    50 +11.5-13 2.80-3.10 0.096
    8
     
    64 +9-11.5 2.30-2.80 0.065
    8
     
    74 +6.5-9 1.80-2.30 0.035
    9
     
    81 +4-6.5 1.45-1.80 0.018
    9
     
    85 +2-4 1.25-1.45 0.009
    9
     
    88 -2 -1.25 0.005