净度

美国宝石协会(GIA)制定了国际公认的体系,根据净度,分无瑕疵到有瑕疵的等级。 无瑕疵钻石是最稀有的,同样它们也是比那些低等级有瑕疵的钻石更加昂贵。

钻石净度分为六个种类,大部分包含几个等级的净度。净度等级从高到低,其钻石的 整体价值也随之减少。然而,即使净度等级会下降,它也不一定会影响到钻石的非磁 化外观。

以下表格是 GIA 等级范围对白钻和彩钻定义了不同等级的净度。

净度等级从最高到最低如下(简化):

  • IF (内部洁净级):在 10 倍放大下,无内含物,但可能有小的外部瑕疵。
  • VVS1/VVS2 (非常非常小的内含物):在 10 倍放大下,内含物非常难以看到。
  • VS1/VS2 (非常小的内含物 1):在 10 倍放大之下,小内含物依旧难以看到。
  • SI1/SI2 (小内含物 1):在 10 倍放大之下,内含物能够轻易检测到。
  • I1/I2/I3 (有瑕疵):当查看钻石顶部,内含物能通过裸眼看到。

彩钻净度

在无色钻石中,净度是决定一颗钻石价值的其中一个最重要的因素之一。然而,钻石 净度在花式彩钻中并没有显得很重要。当购买彩钻时,颜色和亮度是决定钻石价值的 最重要方面。

瑕疵的类型

尽管钻石是今日人类能在地球表面难以想象的深度挖掘出的最强元素。因此,更不用 说,钻石内部会有不同的瑕疵。

钻石内部找到的内含物分为两类:“内部”内含物与“外部”内含物。所有的钻石根 据类型,大小,以及它们的发掘地,都会有内含物,它们不一定会影响钻石的外观。

0.35 克拉的花式紫红心形(外部内含物)

2.28 克拉的花式橙棕圆 SI2(内部内含物)

瑕疵的影响

SI2 级的内含物钻石有时“看起来是洁净的”,尽管其价格可能会低点。这意味着,它 可能会便宜一点,尽管它仍旧价格不菲。不仅仅是净度等级,还有很多因素会影响钻 石外观或者钻石价值。

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I found Northern Cross Diamonds because I was looking for a colored diamond for an engagement ring to propose with. There are not many companies that have colored diamonds but they have quite a few. After considering for a couple of weeks, I decided to contact them to discuss the diamond I was looking at. The guy I worked with, Stephen, was very kind and helped me with the purchase process. I even had to ask them to ship my stone across the world to China.  After I received it I had no doubt about the high quality of their products. I appreciate Stephen and Northern Cross to help me to achieve my perfect proposal plan. I am very happy to have done buisness with them and I will definately recommend Northern Cross Diamonds to anyone looking to get married or who would like to add more stones for their collection. Again, thank you Stephen


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