| Diamond
Color
How
to Color Grade
Probably
the best way to learn to color grade is to ask your jeweler
to show you how. He will have some loose diamonds, a paper
or plastic white grading tray, possibly a set of graded comparison
diamonds called master stones, and a good light source such
as a cool white, more precise filtered, fluorescent light.
You might be surprised when he places the diamond upside down
carat. The on the tray and has you look at the color through
the pavilion (the backside of the diamond). This, however,
is the most accurate way of seeing the fine nuances of color
from one grade to another. Figure 5.1 shows you one common
way of viewing diamonds for color.
A
common way of viewing diamonds for color through the pavilion
of the diamond. The small stone is a master stone weighing
0.30 ` carat. The larger stone is 4.30 carats.
When
you are judging diamonds for color, remember the following
tips:
Judge diamond color against a non-reflective white background.Use
comparison diamonds to determine a precise color grade. Even
professional diamond graders realize that they cannot rely
only on their color memory. They need master stones.
Make
sure the master stones and diamonds to be graded are clean.
Dirt can affect the color grade.Place
your diamond both to the right and to the left of the master
stones. It's normal for it to look lighter on one side than
the other.Pay
attention to the grading environment. Color grading can be
affected by the lighting, the color of the surroundings and
your clothes, the air quality, and the country you live in
(the sun's rays vary according to geographical regions), and
the time of day and year.
Be
careful not to mistakenly downgrade larger diamonds. They
often appear darker than small master stones of the same color
grade because the color is easier to see.
Remember that precise color grading can only be done with
loose diamonds. The color of the metal surrounding diamonds
set in jewelry influences the appearance of the diamonds.
Consequently, their color can only be estimated.
Adeep
cavity
Impossible
to distinguish
Alphabetical
letters ranging
Rays
vary according
Chemical
or plastic
Indication
that color
The
wholesale price
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