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GIA |
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Gemological
Institute
of America.
Established in 1931 as the nonprofit
educational resource for the
gem and jewelry industry, the
GIA is the universally accepted
authority on diamonds. The GIA's
Gem Trade Laboratory is an independent
lab whose trained gemologists
grade diamond quality and provide
a diamond grading report along
with each stone. |
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G
Color |
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Near-colorless.
Slight color is noticeable when
compared to colorless
diamonds, otherwise the diamond
appears colorless. |
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Girdle |
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The
narrow section of a finished
gem that forms the boundary
between the crown
and pavilion
and functions as the gem's setting
edge. The girdle thickness can
range from extremely thin to
extremely thick.
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Girdle Thickness |
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A
diamond’s girdle,
or outermost edge that separates
the upper and lower sections
of the stone, can vary in thickness
depending on how it was faceted
by a cutter during manufacturing.
Ideally, the girdle should thin
to slightly thick so the stone
does not chip and also so the
brilliance is maximized. |
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Gold |
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Gold
is one of the oldest metals
used to create jewelry. It is
very strong and malleable and
does not rust, tarnish
or corrode. |
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Grading
Report |
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A
diamond grading report is a
report written by the GIA
or EGL
describing a diamond's weight,
proportions, finish, color grade
and clarity grade. No valuation
is stated. A grading report
is sometimes called a certificate.
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Grain
Center (GrCnt)
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A
small, concentrated area of
white or dark crystal
distortion with a thread or
pinpoint like appearance. |
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