Cut refers to the proportions, finish, symmetry, and polish of the diamond. These
factors determine the fire and brilliance of a diamond. Well cut diamonds sell at a
premium and poorly cut diamonds sell at discounted prices.
The proportions displayed by the stone are very significant. Two of the key
factors in the grading of cut quality -- table percentage and depth percentage --
are usually expressed on grading reports.
If the stone is cut to deep or to shallow the light will bounce out of the pavilion
and not be reflected back to the eye, thus diminishing the brilliance of the stone.
Color describes the amount of color the diamond contains. This can range from colorless
to yellow with slight tints of yellow, gray or brown. Colors can also range from intense
yellow to brown, blue, green, pink and red. These fancy colors are rare and therefore
Clarity describes the clearness or purity of a diamond. This is determined by the number, size,
nature, and location of the internal (inclusions) and external (blemishes) imperfections.
The clarity scale is broken down into the following grades: