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Emerald Cut Depth Percentage:
Specific proportions regarding the ideal
depth of an emerald cut diamond have not been conclusively determined or published by Gemological Institute of America. Ideal proportion is more difficult to establish in an emerald cut diamond than it is in a
round diamond. A round diamond has a consistent pavilion angle that makes ideal proportions easier to establish as a depth percentage. An emerald cut diamond has a pavilion that is made up of a angles that
vary due to a unique pavilion shape and variance in length and width. (See Diagram)
The depth percentage of an emerald cut diamond is
determined by dividing the depth measurement by the diameter measurement. Diameter is determined by measuring an emerald cut diamond's width from side to side. The longer length measurement is not taken into consideration when
calculating diameter. By viewing an emerald cut diamond from the end view you can see how slightly different the pavilion looks from that of a round diamond. Emerald cut diamonds
require a diamond cutter to cut a steeper pavilion angle than what is normally cut on a round diamond. This steeper angle ensures greater brilliance in an emerald cut. An emerald cut
diamond has a uniquely beautiful shape that is favored by many women for its beauty as well as its unique design capabilities.
The diagram illustrates a variety of emerald cuts showing resulting changes in appearance due to differing depth percentages and length-to-width ratios. The proper depth percentage for an emerald cut is between 65% and 75%. You will find that an emerald cut diamond cut within this range will deliver more brilliance. An emerald cut diamond cut shallower than 65% will let a greater percentage of light leak through the pavilion which results in less diamond brilliance. Emerald cut diamonds with depth percentages greater than 80% will appear darker in the center resulting from a large amount of light refracting through and out the bottom of the diamond.
When choosing an emerald cut diamond be aware of the depth percentage as well as measurements and length-to-width ratio. They will give you a clearer indication how an emerald cut diamond is shaped. Our Certified Gemologist-Appraisers will be happy help guide you to the most brilliant emerald cut diamond your money can buy.