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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
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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.
Size is the most obvious factor in determining the value of a diamond. However,
two diamonds of equal size can have very unequal values, depending on their
quality. Also, diamonds of high quality can be found in all size ranges. Larger
diamonds are found relatively infrequently in nature and therefore more
valuable.
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