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