How Professionals Use the 4 Cís
: Size is one
of the easiest things for professionals and non-professionals to
judge. All you need is a standard metric balance to measure how
many milligrams are in the diamond. For an exact official
figure, electronic scales are used.
2. Cutting :
The standard cut is easy and obvious for trained professionals
to judge. We check the symmetry, the depth, and the polishing.
It takes some training to develop this judgment, but it is not
especially hard. Any experienced gemologist should have no
trouble evaluating this quality.
There is a trade-off between size and cutting in terms of price.
A lower-quality cut may actually produce a heavier stone, but it
will be less brilliant and worth less per carat.
3. Clarity : Diamonds range from completely opaque in all kinds of colors
(usually brown/yellow) to completely colorless, like fine
crystal. Below a certain limit, diamonds are rated as
ďindustrial qualityĒ- suitable for machines or laboratory work,
but not attractive enough to be gemstones. At a minimum
transparency, diamonds are still charming, though slightly
impure, and these are the lowest grade of gem-quality stones
(typically a deep yellow). As the diamond becomes more
transparent, it increases in grade and value, until the highest,
completely transparent grade is reached.
Diamonds which retain their transparency but have an even
stronger hue of yellow or another color belong to a separate
category of gemstones, which can be extremely valuable but are
not standardized in quality for investment.
4. Color : Ideally, standard diamonds have no color- they are transparent.
These stones are more rare, so they are also more valuable. The
process to grade a stoneís color is quite complicated, involving
machinery such as a colorimeter and comparisons with master
diamonds (standardized gems for investment grading). This
evaluation requires well-trained experts, who may sometimes even
disagree slightly on the same stone. This rating, more than the
others, cannot be judged by a casual buyer.
Obviously, this is the most uncertain of the 4 Cís for
investment rating. Itís hard to know who is being honest and
professional with you without independent verification. That is
why at D-Plus we issue our certificates of authenticity for the
quality of the diamond and give a guarantee of buyback at that
same quality based on market values, with a reasonable margin
for our services. If you sell elsewhere to professionals, you
should receive similar value if they are honest; however,
remember that businesses everywhere are trying to make a profit,
and many do not actually employ trained professionals on their
sales staff. At D-Plus we guarantee our work, our staff, and our
diamonds. Donít risk your money! Follow these guidelines:
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