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钻石颜色为什么从D开始分级? - ROTASS
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钻石颜色为什么从D开始分级?

  众所周知,对于一颗成品钻石,国际上采用4C标准来进行分级。不知道大家有没有发觉,4C中的颜色分级是从字母D开始,一直到字母Z结束,一共23个等级。那么,你有想过为什么是从D开始吗,为什么没有A、B、C呢?

  

  在GIA的D至Z的分级系统尚未明确之前,钻石行业用各种各样的符号标记,有的使用A级,B级,C级,有的则用双A,也有其它系统使用阿拉伯数字或罗马字做级数的,这类容易混淆的字词不精确,经常会导致发生误导,所以GIA制度的创始人们希望有新的开始,不希望和不良系统间有任何关联,因此以D做为制度的起始。

  不过,还有另外几种说法。D是钻石英文的第一个字母,所以钻石颜色从D开始,此外,有人说GIA检测颜色时用的比色石没有D色的,也有的人认为GIA创始者给人留了A、B、C色,以备发现比D色更透更白的钻石,还有就是玉石也是宝石的一种,而通常玉石的品质都被分为A、B和C货,为了不与钻石发生分歧,所以就以D色为起点



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