Page 36 - Style Book

Average Crown AGS Angle in Degrees Grade
28.3 and less 10 28.4 to 29.1 9 29.2 to 29.8 8 29.7 to 30.1 7 30.2 to 30.6 6 30.7 to 31.1 5 31.2 to 31.6 4 31.7 to 32.1 3 32.2 to 32.6 2 32.7 to 33.6 1 33.7 to 35.8 0 35.9 to 36.3 1 36.4 to 36.8 2 36.9 to 37.3 3 37.4 to 37.8 4 37.9 to 38.3 5 38.4 to 38.8 6 38.9 to 39.3 7 39.4 to 39.8 8
39.9 and greater 10
Average Table AGS Diameter % Grade
46.3 and smaller 10 46.4 to 47.3 9 47.4 to 48.3 8 48.4 to 49.3 7 49.4 to 50.3 5 50.4 to 51.3 3 51.4 to 52.3 1 52.4 to 57.5 0 57.6 to 59.5 1 59.6 to 61.5 2 61.6 to 63.5 3 63.6 to 65.5 4 65.6 to 67.5 5 67.6 to 69.5 6 69.6 to 71.5 7 71.6 to 73.5 8 73.6 to 75.5 9
Cross Jewelers Royal Ideal Precision
Royal Ideal
crown 15.4 ± .6% girdle 2 ± .5%
culet 981/2˚
The C performan the-art Sar
To be The Cro
girdle diameter
table
34 1/2˚ 40 3/4˚
100% 53% - 57%
AGS Grade
Polish Extremel
0
1 2 3
Very diffi
pavilion 43.1%
4
5
6
Relatively unaided
Average Pavilion AGS Depth % Grade
Easy to se with una
Difficult t
39.4 and less 9-10 39.5 to 40.1 8 40.2 to 40.6 7 40.7 to 41.1 5 41.2 to 41.6 4 41.7 to 42.1 2 42.2 to 43.8 0 43.9 to 44.3 1 44.4 to 44.8 2 44.9 to 45.3 4 45.4 to 45.8 5 45.9 to 46.3 6 46.4 to 46.8 7 46.9 to 47.5 8 47.6 to 48.5 9
Very easy with una
Culet Size
AGS Grade 0
1
7
Obvious t unaided
Pointed, Very Small Small, Medium Slightly large
Large
8
9 - 10
Relatively Easy to se Obvious t
Cross Jewelers
Very large Extremely large
3
5 *Polish and symmetry 7, 8, 9, 10 Sarin machine and stil
Cross Jewele
1-800-433-2988
Total Depth % 59.6 - 61.6
Average Girdle Thickness*
AGS Grade
Extremely thin
Very thin
Thin, medium, slightly thick Thick
Very thick
Extremely thick
7 4 0 3 5 7-10
*overall average