diamond certificate (also called a "diamond grading report") is a document
containing the characteristics about the diamond that will make up its value.
It is the pedigree that goes with the diamond and becomes a valuable document
in case of loss because it will ensure that your insurance company will replace
your stone with another certified stone of like quality. Certificates are not
appraisals since they do not contain any information regarding the value or price
of a diamond.
Grading laboratories like the HRD
and IGI measure
and grade diamonds sent to them by wholesalers and retailers. They provide documents
called certifications describing the diamond.
and IGI also educates gemmologists but just because a gemmologist graduated from
the HRD and IGI educations program does not mean they are somehow qualified to
"certify" a diamond. Many diamond shoppers mistakenly think that just
because a person graduated from a HRD and IGI class, that their opinion in any
way "certifies" a diamond. Respected grading labs to not sell diamonds
since that would be a conflict of interest.
retailers who issue their own in-house certifications. We can only think of one
reason that a retailer would issue their own certification opposed to an independent
laboratory certification, and that is so they can exaggerate the colour and clarity
grades. The result is you are paying for quality that you are not getting in your
diamond. In other words, you buy a diamond with paperwork saying it is G/VS2 quality
when, in fact, it is I/SI1 quality by HRD or IGI standards.
owner of a diamond can submit it to a laboratory for a grading report. The most
important service these laboratories provide is an impartial examination and grading
of the diamond. They are paid a fee to provide this service but are not biased
to grade higher or lower and can therefore be relied on to provide an accurate
description of the diamonds vital characteristics.
the websites of HRD and IGI for more information:
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