No more 4C grading, now lab-grown diamonds are ‘premium’ or ‘standard’ | Mumbai News

MUMBAI: In a move poised to reshape the global gem trade, the Gemological Institute of America (GIA) has announced it will no longer apply the 4Cs grading system-cut, colour, clarity, and carat weight-to laboratory-grown diamonds. Instead, beginning from later this year, GIA will issue simplified descriptors for such stones-broadly classifying them as ‘premium’ or ‘standard’-…

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