Proportions for Round Brilliant cut diamonds Components AGS 000 Ideal Proportions Near Ideal Proportions
Total Depth 61.6 - 62.7% 60.1 - 62.8% 57.0 - 65.0%
Table Diameter 54.0 - 57.0% 53.0 - 57.0% 51.5 - 60.0%
Girdle Thickness thin to medium very thin to medium very thin to thick
Culet Size none none to medium none to sl. thick
Crown Angle 34.5 degrees 33 - 35 degrees 30 - 35 degrees
Crown Height variable 16.2% 11.0 - 16.2%
Pavilion Angle 40.75 degrees . .
Pavilion Depth 43% 43.1% 41.5 - 45.5%
Symmetry excellent excellent to very good excellent to good
Finish excellent excellent to very good excellent to good