美国宝石研究院GIA

 

美国宝石研究院GIA


美国宝石研究院 (GIA) 成立于 1931 年,作为一家独立的非盈利机构,是世界上公认的最重要的宝石学权威。 1931 年创立以来,GIA 创建了钻石品质 4C 标准和 GIA 珍珠价值七大要素 (GIA 7 Pearl Value Factors™)并于 1953 年创建了国际钻石分级系统™。如今,这个系统已成为全世界公认的钻石质量标准





ABOUT GIA 

 

Founded in 1931, GIA, an independent non-profit organization, is recognized as the most important gemological authority in the world. Since its establishment in 1931, GIA has created the 4C standard of diamond quality and GIA 7 pearl value factors Gamma )The international diamond classification system was established in 1953 ™。 Today, the system has become a recognized quality standard for diamonds around the world.

 

 

 




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