While the diamond world uses the 4Cs — color, clarity, cut and carat weight — to determine a stone’s value, the desirability of natural pearls rests on a different set of factors: weight, surface ...
New Delhi: The International Gemological Institute (IGI) has reaffirmed its commitment to applying the universal 4Cs grading system - cut, color, clarity, and carat to all diamonds, including ...
This initiative is not merely a terminology adjustment; it represents a systematic effort to separate the grading systems for lab-grown and natural diamonds. As a non-profit organization, GIA ...
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