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 Post subject: Re: How would you define this sapphire’s colour?
PostPosted: Mon Jun 29, 2020 9:09 am 
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Joined: Thu May 12, 2016 2:18 am
Posts: 801
GIA has a colored stone grading criteria system (still developing) similar to the Diamond criteria. It is not been released to use in the labs yet, but is being actively taught as part of the G.G. course now.

As soon as this standardized system gets elevated to the colored stone industry the public will be better off, just like they are with Diamonds today. Salesmen looking for high margins will not be, as margin compression will almost certainly be part of the result.

Remember River, Cape, Blue White, Jager, Canary, etc, as color descriptions of diamond? Aren't we all glad those are gone now?

What color is Padparadscha? Well that depends on who is looking at it and making the call. But if you have a system that defines the Hue, Saturation, and Tone ranges that qualify as a Padparadscha then the issue is fairly simple. It also becomes easier for a jeweler to communicate with a supplier. He can say, the customer favors stone more to one side or the other of each parameter.

This goes for all colored stone varieties.


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