Established in 1931, GIA is recognized as the world’s foremost authority in gemology with the invention of the famous 4Cs and International Diamond Grading System™. The Institute is dedicated to ensure the public trust by upholding the highest standards of professionalism.
In a show-stopping move, we are evolving our industry-leading resources by taking all GIA reports digital by 2025.
Learn about the exciting changes coming to GIA’s industry-leading gem identification and grading reports: New formats, an exciting customer experience, the way to use a diamond to access its GIA report.
全新流動版「會員名錄」
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