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Gem and
diamond reports are detailed documentation on the stone. Everything from
the
measurements, the 4C's, the proportions, and even the plot are included
in that report.
Like appraisals, gem reports can be subjective to opinion and standards.
Gem reports are usually
produced by highly qualified institutions like the GIA (Gemological
Institute of America), ethical organizations like the AGS (American Gem
Society), and
government or university backed like the HRD (High Diamond Council). The
gem reports
and certificates that are well known in the jewellery industry are GIA
Gem Trade Laboratory,
AGS and HRD . Two are from the U.S. and the latter from Belgium.
There are other laboratories
that specialize in gem and diamond reports like the EGL and IGI.
Moreover, every qualified gemologist should be able to produce a gem report
using proper
equipment and gemological techniques. At IGL, our gemologists were
educated and trained
at the GIA thus are skilled to conduct highly detailed reports on a gem
stone's characteristics
and proportions for diamond brokers, jewellers and consumers alike. We
take pride in providing
one of the most detailed gem reports in the industry.
Here is a sample of
our diamond report...

Plot:
Plotting, or recording clarity characteristics on a diagram using conventional
symbols
to indicate the relative size, nature, number, colour and location of
inclusions and blemishes.
Three colours of ink are used on the plot diagram 1) Red
for inclusions, 2) Green for blemishes
and 3) Black for extra facets and settings.
Reasons
for Plotting:
- a
plot aids in the identification of a diamond at a future date,
- it establishes the condition of a diamond at the time of plotting,
and
- it supports the clarity grade assigned to the diamond.
The
Inclusion Locator Chart TM,
developed by IGL, is a new way to locate inclusions in a
diamond without the use of a plot. As long as the gemologist or appraiser
has this chart below,
he/she can communicate where the inclusions are located according to their
related letter/
number on the chart. For example... a feather may extend from the table
to star to bezel facets
at this exact location on a diamond Feather:
00-S1-B1 or Pinpoint: U8, B6, S3

Laboratory
links:
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