Updated on Jul 10, 2019
为了确保与联邦贸易委员会 (FTC) 珠宝指南 2018 年更新内容保持一致，GIA 将术语更改为“实验室制造”，而不再使用“合成”。
Older Versions of GIA 4C指南
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All Versions of GIA 4C指南
2.0.1(20001)APKDownloadJul 10, 201929.5 MBAndroid 4.0.3+- 2.0.0(20000)APKDownloadAug 8, 201829.5 MBAndroid 4.0.3+
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