AGS(钻石证书)

By Michael Fried
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AGS 钻石证书

AGS(美国宝石机构)以自己是最早提供钻石切割等级的鉴定中心而自豪。在GIA推出他们的切割等级以前的一些年,AGS就提供了他们独一的切割等级尺度,从0到9(0就是代表“完美切割”)。

回到过去那些日子,AGS垄断着市场上的“完美切割”(例如顶级的供应商Brian Gavin钻石)。一颗钻石如果没有AGS证书的证明的话是不可能称为“完美切割”的。现在因为GIA进入了切割等级评定的游戏,他们的市场份额也有了很大的下滑。

现在,就如人们出售的“三个X”(抛光,比例,和切工都是完美的,而且是GIA鉴定的)和他们的“三个0”是一样的(AGS的“0”等同于GIA的“完美”)。

AGS vs GIA

AGS试图标榜他们自己要比GIA更好一点,更细致一点。但事实上是很难分辨两者的区别的,而且AGS通常还要比GIA更宽松一点。

大多数的钻石公司都认识到了这点,他们就把鉴定等级不够满意的石头送到AGS去,以便在净度和颜色上得到一点升级。通常在这点他们很成功。

不像EGL,这点并没有市场范围上的共识,所以一般来说由AGS鉴定的钻石的价格和GIA是差不多一样的。如果我必须要推荐一个从GIA升级的平均的净度和颜色的话,我可能会说应该是半个等级。

不管怎么说,AGS是一个值得信赖的鉴定中心。在钻石专业网站中,我们只推荐来自GIA和AGS鉴定的钻石,我们也只和相关的供应商合作(例如James AllenBrian Gavin钻石),因为他们都比较注重这两个鉴定中心。

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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