GIA做各種寶石，玉石鑒定。其他大學地質係實驗室也一樣做鑒定，隻不過GIA介入鑽石銷售商務領域，所以為人熟知他們的鑽石鑒定權威。

來源: wolfkiller8 於 2016-08-23 14:26:07 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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