gia完美切工标准是什么

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       gia切工等级标准

       gia钻石鉴定jigouzonghezuanshiduichengxing、paoguangxing、qiemohaohuaijiangzuanshiqiegonghuafenweiwugedengji，fenbieweilixiangqiegong(excellent，jianchengex)、feichanghaoqiegong(very good，jianchengvg)、haoqiegong(good，jianchengg)、yibanqiegong(fair，jianchengf)、chaqiegong(poor，jianchengp)，qizhongexqiegongjibiezuigao，yejiushiwomensuoshuodewanmeiqiegong。

       钻石完美切工划分标准

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钻石切割比例标准

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