Less Equals More
Diamonds composed of
pure carbon are colorless. But such stones are quite rare. Most diamonds
contain varying degrees of nitrogen, boron or hydrogen, any of which
impart color. The majority of diamonds exude barely perceptible shades of
yellow or brown, which are attributed to traces of nitrogen.
Understanding Diamond Color Grading
Many systems
have been used to grade diamond color. To eliminate confusion, the
Gemological Institute of America (GIA) introduced a color grading system
in the 1950s that is used today by the entire diamond industry. The scale
begins at D (colorless) and ends at Z (light yellow). The scale starts at
D because that letter had not been used previously to classify color.
How Color
Grading Is Performed
Diamond color is difficult to discern when
a diamond is viewed face-up. Therefore, the grader turns the diamond
facedown against a pure white surface under carefully controlled light.
The diamond grader compares the diamond to a so-called master stone to
determine color. A master stone is a diamond of a predetermined color that
is used for comparison.
Diamond Color Grades
-
D (Colorless) - Highest color grade
your diamond can achieve. This color emits unequaled brilliance, and is extremely
rare.
-
E
(Colorless) - Containing minute traces of color. Emits unsurpased brilliance, and
is very rare.
-
F (Colorless) - Minute traces of color can only be detected by a
trained gemologist. This is a high-quality color grade.
-
G, H (Near Colorless) - Noticeable color only when compared to higher
color grades. Excellent value, as it appears colorless to the untrained
eye.
-
I, J (Near Colorless) - Slightly detectable color.
Excellent value, as it appears colorless to the eye.
-
K, L, M (Faint Yellow) - Faint
color noticeable. Even with the presence of color, diamonds
can emit fire and beauty.
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