| 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) |
Select Emerald Cut Diamonds Within
These Ranges
|
|
total
depth % ---------- 65% - 75% |
|
table
% ---------------- 65% - 75% |
|
girdle
thickness ---------Very Thin - Thick |
|
cullet
------------------ None - Medium |
|
polish
------------------ Excellent - good |
|
symmetry
-------------- Excellent - Good |
|
flourescence
----------- None - Faint |
Length
to width ratio --- 1.35 - 1.65 to
1 |
|
 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 ratios.
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. |
