CUT CLASSES
|
Class 1A
|
|
Ideal cut
|
Table %
|
60-65.5%
|
Crown Height %
|
12-15.%
|
Girdle thickness
Word descriptions and percentages.
|
V. Thin to Sl. Thick
(0.4%-4.5%) or
Thin to Thick (1%-5.5%)
|
Total Depth %
|
60-65%
|
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 %
|
59-68%
|
Crown Height %
|
11-16%
|
Girdle thickness
Word descriptions and percentages.
|
V. Thin to Sl. Thick
(0.4%-4.5%) or
Thin to Thick (1%-5.5%)
|
Total Depth %
|
60-65%
|
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 %
|
58-69.5%
|
Crown Height %
|
10-16.5%
|
Girdle thickness
Word descriptions and percentages.
|
V. Thin to Sl. Thick
(0.4%-4.5%) or
Thin to Thick (1%-5.5%)
|
Total Depth %
|
60-65%
|
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 %
|
57-72%
|
Crown Height %
|
9-17.2%
|
Girdle thickness
Word descriptions and percentages.
|
V.Thin to Thick(0.4%-5.5%)
|
Total Depth %
|
58-69%
|
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
|
1.49-1.26
1.76-1.99
|
CUT CLASSES
|
Class 3A
|
|
US domestic average cut
|
Table %
|
56-74%
|
Crown Height %
|
8-18.0%
|
Girdle thickness
Word descriptions and percentages.
|
Very Thin to Very Thick
(0.4% to 7.0%)
|
Total Depth %
|
57-74%
|
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
|
1.49-1.26
1.76-1.99
|
CUT CLASSES
|
Class 3B
|
|
US domestic average cut
|
Table %
|
53-76.%
|
Crown Height %
|
7-19.5%
|
Girdle thickness
Word descriptions and percentages.
|
Very Thin to Very Thick
(0.4% to 7.0%)
|
Total Depth %
|
56-78%
|
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
|
1.49-1.26
1.76-1.99
|
CUT CLASSES
|
Class 4A
|
|
below average
|
Table %
|
50-78.%
|
Crown Height %
|
6-20.5%
|
Girdle thickness
Word descriptions and percentages.
|
Extremely thin to
Extremely thick
(0.0% to >7.0%)
|
Total Depth %
|
53-80%
|
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 < Class 3
|
CUT CLASSES
|
Class 4B
|
|
below average
|
Table %
|
>78%
<50%
|
Crown Height %
|
<6%
>20.5%
|
Girdle thickness
Word descriptions and percentages.
|
Extremely thin to
Extremely thick
(0.0% to >7.0%)
|
Total Depth %
|
>80%
<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 < Class 3
|