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GB/T 16554-2017 钻石分级 现行 发布日期 :  2017-10-14 实施日期 :  2018-05-01

定价: 54元 / 折扣价: 46 加购物车

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GB/T 16554-2003 钻石分级 被代替 发布日期 :  2003-07-01 实施日期 :  2003-11-01

定价: 24元 / 折扣价: 21 加购物车

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GB/T 16554-2010 钻石分级 被代替 发布日期 :  2010-09-26 实施日期 :  2011-02-01

定价: 65元 / 折扣价: 56 加购物车

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GB/T 16554-2017e 钻石分级 现行 发布日期 :  2017-10-14 实施日期 :  2018-05-01

This standard specifies the terms and definitions of natural unmounted and mounted polished diamonds, diamond color, clarity, cut grading rules, diamond weight and diamond grading report.
This standard is applicable to diamond grading and related activities in the fields of gems testing, cultural relics testing, commerce and trade, customs, insurance, pawn, asset evaluation, scientific research teaching, and literature publishing.
The color grading in this standard is applicable to unmounted and mounted polished diamonds in the color series ranging from colorless to pale yellow (brown, gray).
The cut grading in this standard is applicable to unmounted and mounted polished diamonds of round brilliant cut.
The grading rules in this standard are applicable to unmounted and mounted polished diamonds that have not been treated by coating,filling, etc.
The grading rules in this standard are applicable to unmounted polished diamonds with a weight of 0.040 0 g(0.2

定价: 1104元 / 折扣价: 939 加购物车

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