GIA 是世界上最值得信赖的钻石分级和宝石鉴定机构。GIA 以其客观性和专业性为标杆,确保出具的每一份鉴定证书均完整、准确。GIA 对提交的每种材料进行检测,确定其是否为天然材质,并在检测过程中揭示任何已发现的处理方式。
了解更多Assessment of authenticity and quality for diamonds in the D-to-Z color range from GIA, creator of the 4Cs.
了解更多Assessment of color origin and quality based on GIA’s color grading system for diamonds outside the D-to-Z range.
了解更多Identification of laboratory-grown diamonds, ensuring disclosure through laser inscription and distinctive reports.
了解更多Confirmation of a gemstone’s identity and characteristics through a full gemological examination.
了解更多Documentation of the specific attributes of pearls and pearl jewelry, including mollusk type and growth environment.
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