Manufacturing Jewelers and Diamond Cutters
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Range of Acceptable Values
FRACTION
ACTUAL VALUE
ACCEPTABLE RANGE
1/25
0.040
0.03 - 0.04
1/20
0.050
0.05 - 0.06
1/16
0.063
0.06 - 0.07
1/12
0.083
0.08 - 0.09
1/10
0.100
0.09 - 0.11
1/8
0.125
0.12 - 0.14
1/6
0.166
0.15 - 0.18
1/5
0.200
0.19 - 0.22
1/4
0.250
0.23 - 0.29
1/3
0.333
0.30 - 0.37
3/8
0.375
0.38 - 0.45
light 1/2s
0.475
0.46 - 0.48
1/2
0.500
0.49 - 0.59
5/8
0.635
0.60 - 0.69
3/4
0.750
0.70 - 0.79
4/5
0.800
0.80 - 0.89
9/10
0.900
0.90 - 0.99
1 ct
1.000
1.00 - 1.10
©2009 • Carl K. Gumpert, Inc.