钻石的切割品质

By Michael Fried
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底线的推荐:

  • 钻石切割等级: 对于GIA鉴定的钻石,一颗被鉴定为“非常好”的钻石看起来是很好的。然而,你还是可以注意到升级到“完美”后的光辉的增强。对于AGS鉴定的钻石,一颗被鉴定为“完美”的钻石也是足够的,但是你也可以注意到升级到“理想”后的光辉的增强
  • 为了得到最大的光辉:可以考虑 Brian Gavin签名的切割。Brian是切割优化领域的领军人物。他签名的切割是和著名的八箭八心品牌齐名 — 还更便宜。
  • 对于圆形明亮型的钻石,不要信任在线的供应商的切割等级。只重视 GIA或是 AGS证书上的切割等级

钻石切割 — 一个定义

钻石的切割指的是钻石的比例有多么的好。举个例子,它的直径和深度的比例是多少?它的各种各样的角度是多少,它们之间是怎么作用的。

虽然这可能看起来是个很深奥的问题,还是有基本的因素来决定你的钻石看起来有多漂亮,为了有个直观的概念来了解这些问题的主要性,可以看下James Allen的钻石切割专页。

钻石切割等级 — 所有相关的事情

直到2006年的一月一日,当你谈到钻石的切割等级时,你也只有两个选择。

你可以购买一颗AGS证书的钻石,并且相信他们的切割评定系统,或是你可以学习钻石切割的各种比例,靠自己的知识来决定什么样的比例是最美丽的钻石。

就在那一天,GIA在证书里引进了自己的钻石切割等级系统。他们声明自己的钻石评定系统是基于15年的研究测试,并且是花时间来测试各种不同的数据组合。

GIA系统 VS AGS系统

不同于AGS系统那种简单的定义什么是“完美”,然后再根据“完美”的数据依次降级到不同的等级,而GIA系统没有任何一个完美的定义。

他们声明在他们的研究中有各种不同的比例组合,来看产出的钻石可以反射更多的光线。

GIA的优势

为了公平,在2005年年中,AGS也意识到自己的做法有些陈旧。所以从6月1日开始,AGS鉴定中心也开始在他们的证书里提供一个新的切割等级。

但是他们发现这种新的方法使钻石很难获得“完美”切割等级的评定。因此,当GIA的切割等级发布半年以后,凭借着更好的解决方案,使AGS失去了很多的市场份额。

认识到自己的错误,并且几乎被挤出市场,AGS鉴定中心在2008年决定仿照GIA,开始提供一个“新的”基于比例的切割评定等级标准。

AGS的“新的”问题

我之所以用引号来写“新的”的原因就是,事实上并没有什么新的东西。AGS的切割等级在2005年之前也是以比例为基准的。

他们只是简单的重新介绍一下,而且这次更有弹性一点。他们做出一个很聪明的决定就是模仿GIA,并且给那些不同心的比例的组合一个完美切割的等级评定。

在我看来,GIA和AGS系统都很好的解决了什么样的比例才能生产出最美丽的钻石。

完美的弹性的解决方案

事实是,这是一个比钻石交易商的直觉更好的解决方案。我的意思是,在GIA发布他们的切割等级之前,大多数的钻石交易商都认为他们和AGS的切割等级是一样的。

他们已经知道什么是最好的数据组合,基本上,钻石离完美越远就越难看。GIA钻石切割等级的评定的公开对于钻石生产者也是一个很好的福利。

现在,切割师在面对一颗原钻的时候有了更多的选择。如果一颗钻石的桌面是57%,但是在保持重量类别的前提下是不适合特定的原钻的话, 那么他们就可以尝试在保持重量类别的前提下,试试60%的桌面

About the author
Mike learned the diamond business from the ground-up at Leo Schachter Diamonds - one of the world's top diamond manufacturers. He has been recognized as a diamond industry expert by Time, PeopleMoney, The Daily Mirror, NerdWallet, The Times Herald, Yahoo Finance Australia, The Art of Charm, The Washington Diplomat, The Next Web, and more. See more
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