CUT CLASSES
|
Class 1A
|
|
Ideal cut
|
Table %
|
62%-68%
|
Crown Height %
|
10-15%
|
Girdle thickness
Word descriptions and percentages.
|
Very Thin to Slightly Thick
(0.4%-4.5%) or
Thin to Thick (1.0%-5.5%)
|
Total Depth %
|
64%-75%
|
Polish/Symmetry
Not a primary determining factor.
|
Excellent to Good
|
Square range
Length/Width ratios
Preferences only
|
0.95-1.05
|
Rectangular range
Length/Width ratios
Preferences only
|
1.5-1.75
|
CUT CLASSES
|
Class 1B
|
|
Premium cut
|
Table %
|
60%-72%
|
Crown Height %
|
8.5-16%
|
Girdle thickness
Word descriptions and percentages.
|
Very Thin to Slightly Thick
(0.4%-4.5%) or
Thin to Thick (1.0%-5.5%)
|
Total Depth %
|
64%-75%
|
Polish/Symmetry
Not a primary determining factor.
|
Excellent to Good
|
Square range
Length/Width ratios
Preferences only
|
0.95-1.05
|
Rectangular range
Length/Width ratios
Preferences only
|
1.5-1.75
|
CUT CLASSES
|
Class 2A
|
|
International fine trade cut
|
Table %
|
59%-74%
|
Crown Height %
|
8-16.9%
|
Girdle thickness
Word descriptions and percentages.
|
Very Thin to Slightly Thick
(0.4%-4.5%) or
Thin to Thick (1.0%-5.5%)
|
Total Depth %
|
64%-75%
|
Polish/Symmetry
Not a primary determining factor.
|
Excellent to Good
|
Square range
Length/Width ratios
Preferences only
|
0.95-1.05
|
Rectangular range
Length/Width ratios
Preferences only
|
1.5-1.75
|
CUT CLASSES
|
Class 2B
|
|
International fine trade cut
|
Table %
|
58%-78%
|
Crown Height %
|
6-18%
|
Girdle thickness
Word descriptions and percentages.
|
Very Thin
to Thick
(0.4-5.5%)
|
Total Depth %
|
58%-80%
|
Polish/Symmetry
Not a primary determining factor.
|
Good or Fair
|
Square range
Length/Width ratios
Preferences only
|
0.95-1.05
|
Rectangular range
Length/Width ratios
Preferences only
|
1.49-1.06
1.76-1.99
|
CUT CLASSES
|
Class 3A
|
|
US domestic average cut
|
Table %
|
56%-82%
|
Crown Height %
|
5-19%
|
Girdle thickness
Word descriptions and percentages.
|
Very Thin to
Very Thick
(0.4%-7%)
|
Total Depth %
|
57%-83%
|
Polish/Symmetry
Not a primary determining factor.
|
Good or Fair
|
Square range
Length/Width ratios
Preferences only
|
0.95-1.05
|
Rectangular range
Length/Width ratios
Preferences only
|
1.49-1.06
1.76-1.99
|
CUT CLASSES
|
Class 3B
|
|
US domestic average cut
|
Table %
|
53%-85%
|
Crown Height %
|
4-19.9%
|
Girdle thickness
Word descriptions and percentages.
|
Very Thin to
Very Thick
(0.4%-7%)
|
Total Depth %
|
56%-84%
|
Polish/Symmetry
Not a primary determining factor.
|
Good or Fair
|
Square range
Length/Width ratios
Preferences only
|
0.95-1.05
|
Rectangular range
Length/Width ratios
Preferences only
|
1.49-1.06
1.76-1.99
|
CUT CLASSES
|
Class 4A
|
|
below average
|
Table %
|
50%-88%
|
Crown Height %
|
3-20.9%
|
Girdle thickness
Word descriptions and percentages.
|
Extremely thin to
Extremely thick
(0% to > 7%)
|
Total Depth %
|
53%-85%
|
Polish/Symmetry
Not a primary determining factor.
|
Poor to Fair
|
Square range
Length/Width ratios
Preferences only
|
0.95-1.05
|
Rectangular range
Length/Width ratios
Preferences only
|
> Class 3 < Class3
|
CUT CLASSES
|
Class 4B
|
|
below average
|
Table %
|
>88%
<50%
|
Crown Height %
|
<3%
>21%
|
Girdle thickness
Word descriptions and percentages.
|
Extremely thin to
Extremely thick
(0% to > 7%)
|
Total Depth %
|
>85%
< 53%
|
Polish/Symmetry
Not a primary determining factor.
|
Poor to Fair
|
Square range
Length/Width ratios
Preferences only
|
0.95-1.05
|
Rectangular range
Length/Width ratios
Preferences only
|
> Class 3 < Class3
|