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How would you define this sapphire’s colour?
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Author:  1bwana1 [ Mon Jun 29, 2020 9:09 am ]
Post subject:  Re: How would you define this sapphire’s colour?

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.

Author:  glhays [ Mon Jul 20, 2020 11:16 pm ]
Post subject:  Re: How would you define this sapphire’s colour?

Quote:
I like the dragon fruit rind description. Without the rind part it sounds quite cool: dragon fruit sapphire :lol:
Really? Sounds childish. My wife would murder me if she ever heard me describing a stone like that.

Author:  1bwana1 [ Tue Jul 21, 2020 10:11 am ]
Post subject:  Re: How would you define this sapphire’s colour?

glhays wrote:
My wife would murder me if she ever heard me describing a stone like that.


And she would be justified. No jury would convict her.

Author:  glhays [ Tue Jul 21, 2020 1:58 pm ]
Post subject:  Re: How would you define this sapphire’s colour?

1bwana1 wrote:
glhays wrote:
My wife would murder me if she ever heard me describing a stone like that.


And she would be justified. No jury would convict her.
Steve, I will hope you do not make it into the jury pool.
Although the term watermelon tourmaline has been so excepted for so long, to non gem savy people have no clue how to interpret the association to a fruit. Would be like having a Pea Skin Tsavorite (Cooked not Raw) or maybe a frozen variety.

Author:  Barbra Voltaire, FGG [ Tue Jul 21, 2020 2:33 pm ]
Post subject:  Re: How would you define this sapphire’s colour?

Yes, there are some examples of trade names which have become standard in the lexicon. And clearly, describing a tourmaline as "watermelon" can work for some.

But, what hues and tones and saturation is our watermelon?
Is our melon not quite ripe yet?
Image
Getting there:
Image
or is it starting to look a little past it's prime
Image

I'd call these stones tri-color and describe appropriate hue, tome and saturation.

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