Weight to diameter ratio

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Approximate ratio of the diameter of a diamond cut in the Kr-57 cut (“Circle”) to its weight.

Cut of the diamond (number of diamonds in 1 carat)	Diameter of diamond, mm	Diamond weight, carat
400-200	0.90-1.10	0.002-0.005
200-120	1,15-1,25	0.005-0.008
120-90	1,30-1,43	0.008-0.011
90-60	1.45-1.64	0.011-0.0166
60-40	1.65-1.88	0.0166-0.025
40-30	1.89-2.05	0.025-0.033
30-25	2.10-2.20	0.033-0.039
25-20	2.21-2.36	0.04-0.05
20-15	2.40-2.60	0.05-0.07
15-10	2.66-2,95	0.07-0.10
10-7	3.00-3.30	0.10-0.14
7-6	3.35-3.55	0.14-0.17
6-5	3.60-3.75	0.17-0.20
5-4	3.80-4.05	0.20-0.25
4-3.4	4.10-4.30	0.25-0.299
0.30-0.39	4.35-4.70	0.30-0.39
0.40-0.49	4.75-5.10	0.40-0.49
0.50-0.59	5.15-5.40	0.50-0.59
0.60-0.69	5.45-5.70	0.60-0.69
0.70-0.79	5.75-5.95	0.70-0.79
0.80-0.89	6.00-6.20	0.80-0.89
0.90-0.99	6.25-6.40	0.90-0.99
1.00-1.24	6.45-6.90	1.00-1.24
1.25-1.49	6.95-7.35	1.25-1.49