Carat is a term with which most people are familiar, but do you know why you pay more for a higher carat diamond? It’s because carat is a measure of weight. One carat is equal to 200 milligrams, and the larger the diamond, the greater the value.
As with the other three Cs, however, carat alone does not determine a diamond’s worth. Two diamonds of equal weight may be vastly different in price due to their cut, color, and clarity
Standards exist for determining current value of a diamond based on the four Cs:
This weekly report is given to diamond merchants and jewelers to set prices for consumers. It is used in the US and abroad but is not always accurate.
The International Diamond Exchange came out with their own pricing list in the 2000s. It is also published weekly and is based on price changes reflected by global trade on IDEX’s trading platform.
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