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Emerald & Radiant Cuts Chart

CUT CLASSES	Class 1A	Class 1B	Class 2A	Class 2B	Class 3A	Class 3B	Class 4A	Class 4B
	Ideal cut	Premium cut	International fine trade cut		US domestic average cut		below average
Table %	61-63.5%	63.6-64.1% 60.9-60%	64.2-65.0% 59.9-59.0%	65.1-69.0% 58.9-58%	69.1-74.0% 57.9-56.0%	74.1-76.0% 55.9-53.0%	76.1-78.0% 52.9-50.0%	> 78.0% < 50.0%
Crown Height %	12.3-14.4%	12.2-11.9% 14.5-15%	11.8-11.5% 15.1-15.5%	11.4-11.1% 15.6-16.2%	11.0-9.5% 16.3-17.0%	9.4-8.5% 17.1-18.5%	8.4-7.8% 18.6-19.5%	< 7.8% > 19.5%
Girdle thickness Word descriptions and percentages.	Thin to Medium or Medium to Thick 1% to 3.0% or 1.7% to 5.5%			Thin to Thick 1% to 5.5% more variance	Very thin to Very thick 0.4% to 7.0%		Extremely thin to Extremely thick 0% to > 7.0%
Total Depth %	60-65%			65.1-69.0% 59.9-58.0%	69.1-74.0% 57.9-57.0%	74.1-78.0% 56.9-56.0%	78.1-80.0% 55.9-53.0%	> 80.0% < 53.0%
Polish/Symmetry Not a primary determining factor.	Excellent to Good			Good or Fair			Poor
Square range Length : Width ratios Preferences only	0.95-1.05
Rectangular range Length : Width ratios Preferences only	1.5-1.75			1.49-1.26 1.76-1.99			> Class 3 < Class 3