The Gemological Institute of America, the world leader in diamond grading, will not use its internationally recognised 4Cs (cut, colour, clarity, and carat weight) grading system for laboratory-grown ...
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 ...
The jewelry industry’s most respected gemological authority has announced a change in how it will evaluate lab-grown gems. By Amy Elliott A certain type of engagement ring seems to have reached peak ...
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