KEY FACTORS

Class 1 Cut Premium

Class 2 Cut Fine Trade

Class 3 Cut Average

Class 4 Cut Below Avrg

Table Size

60%-71% of diameter

58%-77%

53%-85%

Below 53%
Above 85%

Depth

64%-75% of diameter

58%-80%

56%-84%

Below 56%
Above 84%

Crown Height %

8.5%-11%

6.0%-13%

4.0%-17.5%

Below 4.0%
Above 17.5%

Girdle Thickness

thin-med or
med.-thick

thin-thick

very thin -
very thick

extra thin -
extra thick

Polish & Symmetry

good - excellent

fair -good

fair-good

poor to fair

KEY FACTORS

Class 1. Premium Cut

Class 2. Fine Trade Cut

Class 3. Average Cut

Class 4. Below Average

Table Size

54%-61.5% of diameter

52%-64%

50%-70%

Below 50%
Above 70%

Depth

59%-63% of diameter

58%-65.4%

46%-71%

Below 46%
Above 71%

Crown Height %

12.5%-15%

11.1%-16.5%

8.7%-18.4%

Below 8.7%
Above 18.4%

Girdle Thickness

thin-med. or med.-thick

thin-thick

very thin to
very thick

extra thin to
extra thick

Polish & Symmetry

good to excellent

good to excellent

good to fair

fair to poor

Length: Width Ratios

Class 1 & 2
Pr. 1.5-1.75 M.1.75-2.25

Class 1 & 2
Ht..98-1.02 O.1.33-1.66

Class 3 & 4
Pr.1.26-1.99 Mr.1.51-2.49

Class 3 & 4
Ht.0.91-1.24 Ov.1.26-1.74

KEY FACTORS

Class 1. Premium Cut

Class 2. Fine Trade Cut

Class 3. Average Cut

Class 4. Below Average

Table Size

60%-64.1% of diameter

58%-69%

53%-76%

Below 53%
Above 76%

Depth

60%-65% of diameter

58%-69%

56%-78%

Below 56%
Above 78%

Crown Height %

11.9%-15%

11.1-16.2%

8.5%-18.5%

Below 8.5%
Above 18.5%

Girdle Thickness

thin-med or med.-thick

thin-thick

very thin to very thick

extra thin to
extra thick

Polish & Symmetry

good - excellent

fair-good

fair-good

poor to fair

Length-Width Ratios

Emerald Cut: 1.26-1.99