Unique number representing your diamond. This number is registered
in a global database.
date the report was issued.
other than the standard round brilliant are called fancy shapes
or fancy cuts. Their names are based on their shapes. The
best known are the heart, marquise, pear-shaped cut, emerald
cut, princess cut, oval, and radiant.
dimensions of the diamond are stated as "largest diameter
- smallest diameter X depth" for round shapes and "length
X width X depth" for other shapes.
standard unit of weight used for gemstones. One carat equals
.200 grams (or 200 milligrams). Usually abbreviated ct.
and grain lines reflect irregularities in the crystal structure.
Colorless graining usually does not affect the clarity grade;
but white, colored, or reflective graining does.
refers to the angles and relative measurements of a polished
diamond. More than any other feature, proportions determine
a diamond's optical properties. Studies have shown that table
size, crown angle, and pavilion depth have a dramatic effecton
a diamond's appearance.
depth of the diamond divided by the average diameter for rounds,
or the depth divided by the width of the diamond for other
average size of the table facet divided by the average diameter
of the diamond for round shapes, or the width of the diamond
for other shapes.
girdle is the outside edge of the outline of the diamond.
The certificate indicates the thickness of the girdle relative
to the size of the diamond, and the condition either polished
point at the bottom of the diamond. If the culet is faceted
then the certificate indicates the size of the facet relative
to the size of the diamond.
grades represent the quality of the diamond's surface condition
(polish), and the size, shape and placement of the facets,
including the evenness of the outline (symmetry).
the care taken by the cutter in shaping and faceting the rough
stone into a finished and polished diamond.
diamond's symmetry is the arrangement of the facets and finished
angles, created by the diamond cutter. Excellent symmetry
of a well-cut and well-proportioned diamond can have a great
effect on the diamond's brilliance and fire. Grading reports
will often state the diamond's symmetry in terms of Excellent,
Very good, Good, Fair, or Poor.
proportions and finish of the diamond. With the proper proportions,
most of the light that enters a diamond is returned revealing
the diamond's brilliance and fire. Any deviation of these
proportions will compromise the beauty of the stone.
represents the relative absence of inclusions and blemishes
in the diamond. Clarity is graded under 10X magnification
from Flawless to Included based on the size, nature, position
and quantity of the diamond's inclusions.
to an obvious yellow (Z) when compared to Master Color diamonds.
distance from the bottom of the girdle to the culet is the
pavilion depth. A pavilion depth that is too shallow or too
deep will allow light to escape from the side of the stone,
or leak out of the bottom. A well-cut diamond will direct
more light through the crown.
the 1920's a Russian Mathematician by the name of Marcel Tolkowsky
calculated the proportions of the facets in a round diamond
that would bring an ideal balance between brilliance and dispersion.
Any deviation from these designs will compromise the beauty
of the stone.
exposed to ultraviolet light, a diamond may exhibit a more
whitish, yellowish or bluish tint, which may imply that the
diamond has a property called fluorescence. The untrained
eye can rarely see the effects of fluorescence. Diamond grading
reports often state whether a diamond has fluorescent properties.
Fluorescence is not considered a grading factor, only a characteristic
of that particular diamond.
crown is the upper portion or the top of a diamond.
girdle is the outermost edge of the diamond between the crown
and the pavilion. DiamondSafe.com uses the latest in laser
technology to inscribe on each girdle the EGL Certificate
Number. This number is unique to your diamond. If for some
reason your diamond has to leave your possession, maybe to
be cleaned or set into a beautiful piece of jewelry, it is
possible to check if your diamond hasn't been switched by
diagram approximates the shape and cutting style of the diamond.
Symbols on the diagram include the type, nature, position
and approximate size of a clarity characteristic.
the characteristics and symbols shown on the diagram, if present.
Remember, a diamond grading certificate from a leading gemological
laboratory will insure you get the quality you paid for.