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GIA
Gemological Institute of America
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EGL
European Gemological Laboratory
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JBT
Jewelers Board of Trade
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AGS
American Gem Society
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DHC
Diamond High Council
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IGI
International Gemological Institute
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Diamond Education
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Cut
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Clarity
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Color
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Carat |
Cut
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Cut refers to the angles and proportions a skilled craftsman creates in
transforming a rough diamond into polished diamonds. Nature determines so much
about a diamond, but it takes a master cutter to reveal the stone’s true
brilliance, fire and ultimate beauty.
Based on scientific formulas, a well-cut diamond will internally reflects light
from one mirror like facet to another and disperse and reflect it through the
top of the stone. This results in a display of brilliance and fire.
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Clarity
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When light enters a diamond, it is reflected and refracted out. If there is any
thing disrupting the flow of light in the diamond, such as an inclusion,
proportion of light will be lost. As a result brilliance could be diminished.
The number of inclusions can determine the degree of brilliance.
Inclusions, which are sometimes referred to as "Nature’s Fingerprints", are
usually not visible to the naked eye unless magnified.
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Color
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The best color for a diamond is no color. Because it is the totally colorless
diamond that acts as a prism, allowing light to pass effortlessly through the
diamond and be transformed into rainbows of color. To give a woman the purest
white diamond is to show your true colors as well.
The color grading scale goes from totally colorless to light yellow. The
differences between one grade and another are very subtle, as can be seen by the
number of grades within any one category.
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Carat
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Carat is often confused with size even though it is actually a measure of
weight. Sometimes, you might think a larger diamond appears more brilliant than
a smaller one. This is because light must travel a greater distance through a
larger diamond. The result is a prism effect that your eye registers as more
brilliance and fire. One carat is divided into 100 "points" so that a diamond of
75 points weights .75 carats.
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