Emerald Cut Diamond

The Emerald cut is a step cut with angled corners and rows of pavilion and crown facets that run parallel to the girdle. The traditional Emerald cut is rectangular in shape. Recommended length to width ratio for Emerald cuts is 1.50-1.75. Emerald cuts are known for their understated elegance.

Special Characteristics of the

It is easier to see inclusions in Emerald cuts vs. brilliant cuts. Optimally, a balanced and symmetrical stone with a table % that is smaller than the total depth % is recommended. There are a myriad of combinations that can make for beautiful stones, but guided parameters are now available.

Size Matters

Rectangular Emerald cuts that are not overly deep, that are within the recommended girdle thickness range may look larger from the “face up” position than princess cuts, radiant cuts, and round brilliants of the same carat weight.

Basic Emerald Cut Guidelines courtesy of http://www.gemappraisers.com/index.asp

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 %	60-65.5%	59-68%	58-69.5%	57-72%	56-74%	53-76.%	50-78.%	>78% <50%
Crown Height %	12-15.%	11-16%	10-16.5%	9-17.2%	8-18.0%	7-19.5%	6-20.5%	<6% >20.5%
Girdle thickness Word descriptions and percentages.	V. Thin to Sl. Thick (0.4%-4.5%) or Thin to Thick (1%-5.5%)			V.Thin to Thick(0.4%-5.5%)	Very Thin to Very Thick (0.4% to 7.0%)		Extremely thin to Extremely thick (0.0% to >7.0%)
Total Depth %	60-65%			58-69%	57-74%	56-78%	53-80%	>80% <53%
Polish/Symmetry Not a primary determining factor.	Excellent to Good			Good or Fair			Poor to Fair
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