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GIA Redefines Lab-grown Diamond Grading Standards Discontinuation of 4Cs Grading System Enhances Differentiation Between Natural and Lab-Grown Diamonds

  • Written by A Diamond is Forever
HONG KONG SAR - Media OutReach Newswire - 10 June 2025 - The Gemological Institute of America (GIA), the world's foremost authority in gemology announced a redefinition in diamond grading on June 2, 2025. Beginning at the end of 2025, GIA will cease using the internationally recognized 4Cs grading system (Cut, Colour, Clarity, Carat) for...

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