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Uploaded by MaBelleJewellery on Apr 6, 2010
所謂評估鑽石的4C標準,就是指鑽石內的重量、淨度色澤和車工。鑽石以克拉計算,一克拉相等0.2g,淨度是指鑽石內的天然物質,當然以越少越好。
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