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Color Depth Difference between Fancy Light Yellow and Y~Z
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=7&t=16063
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Author:  roshanravan [ Thu May 31, 2012 11:38 am ]
Post subject:  Color Depth Difference between Fancy Light Yellow and Y~Z

i would glad to know your opinion on FLY diamonds
as you all know Light Yellow In GIA Color Grading is from S to Z which Y~Z range is the most saturated in yellow,

The GIA's Fancy Grades Are:

• Faint
• Very Light
• Light
• Fancy Light
• Fancy
• Fancy Intense
• Fancy Vivid
• Fancy Dark
• Fancy Deep

Color Grading of Colored Diamonds is done only from Face-Up view.

so what does qualify a Light Yellow Diamond to fall into Fancy Grade or Y~Z.

IMHO the only difference between Y~Z and FLY is about how Cut of the diamond shows more color depth Face-Up.

Y~Z color Diamonds are beautiful as FLY Diamonds but there is big difference in their price.

In the Colored Diamonds grading there is no Faint/Very Light/Light grades for Yellow diamonds and i think there should be no FLY Grade too because they are actually the same color, only different is in luster from face-up .

Author:  Alberto [ Fri Jun 29, 2012 5:16 am ]
Post subject:  Re: Color Depth Difference between Fancy Light Yellow and Y~

hola Farshid,

agree on all what you said above, i would leave a little thought though.....
Cape series are almost always affected by nasty greenish overtone in low grades, Fancy yellows usually can have that as a component but in not so dramatic way.
Of course Fancy greenish yellows are widely available comparing to more pure yellows but their price, you know is FAR lower.....
ciao
albé

Author:  Egor Gavrilenko [ Fri Jun 29, 2012 5:41 am ]
Post subject:  Re: Color Depth Difference between Fancy Light Yellow and Y~

Has anyone ever seen X, Y, Z color diamond certificate?
Or, let's say, O-Z colors?
Do they really exist?

Author:  Alberto [ Fri Jun 29, 2012 5:55 am ]
Post subject:  Re: Color Depth Difference between Fancy Light Yellow and Y~

Egor Gavrilenko wrote:
Has anyone ever seen Y, X, Z color diamond certificate?
Or, let's say, O-Z colors?
Do they really exist?


oh yes..
i saw a close-to-2 cts radiant reported as fancy light from a BIG lab and, surprisingly got an "S-T" from another BIG lab (i said surprisingly cos, as for my and not only mine experience, the lab who graded it "S-T" is usually "softer than the other one, if you get what i mean... :wink: )

i even saw a 6+ ct graded S-T by a BIG lab which was slightly lighter in colour than another 5+ cts graded M-N by the same lab............... nevermind Egor........that discussion could last forever............and i'm pretty sure you're familiar, as a working gemologist with such descrepancy aswell.... :wink:

ciao
albé

Author:  roshanravan [ Fri Jun 29, 2012 6:20 am ]
Post subject:  Re: Color Depth Difference between Fancy Light Yellow and Y~

@Alberto
Yep, those are Canary Yellow Diamonds and Canary yellow and orange colors are very common in type Ib diamonds which of course Type Ib itself are 0.1% of diamonds and very rare like IIb


Egor Gavrilenko wrote:
Has anyone ever seen X, Y, Z color diamond certificate?
Or, let's say, O-Z colors?
Do they really exist?

not seen, i sold many, please note after N color (i have N color stone) GIA grades color as a pair range, like this:
O~P
Q~R
S~T
U~V
W~X
Y~Z

here is W-X stone:
https://myapps.gia.edu/ReportCheckPorta ... ight=1.01#
here is Y-Z stone:
https://myapps.gia.edu/ReportCheckPorta ... eight=2.00

at the moment i have nice Round 3.19ct S~ T VS1 in my hand, if Brown is Overtone instead of Yellow some dealers call these type of stone as Champagne Diamonds
C1 ("Light Champagne") : N,O,P,Q color
C2 ("Light Champagne") : R,S,T,U,V color
C3 ("Medium Champagne") : W,X color
C4 ("Medium Champagne") : Y,Z color
C5 ("Dark Champagne") : Fancy Brown
C6 ("Dark Champagne") : Fancy Brown to Fancy Dark Brown
C7 ("Fancy Cognac") : Fancy Dark Brown

Author:  roshanravan [ Fri Jun 29, 2012 6:28 am ]
Post subject:  Re: Color Depth Difference between Fancy Light Yellow and Y~

also found a nice Q-R diamond which it has picture:
Attachment:
Q-R.jpg
Q-R.jpg [ 80.34 KiB | Viewed 3172 times ]

Author:  Alberto [ Fri Jun 29, 2012 6:35 am ]
Post subject:  Re: Color Depth Difference between Fancy Light Yellow and Y~

wow Farshid, what a cut!!! 8) ist that an H&A??? guess yes!! :D
ciao
albé

Author:  roshanravan [ Fri Jun 29, 2012 7:01 am ]
Post subject:  Re: Color Depth Difference between Fancy Light Yellow and Y~

Alberto wrote:
wow Farshid, what a cut!!! 8) ist that an H&A??? guess yes!! :D
ciao
albé

yes its very nice EXEXEX stone
about H&A you can judge yourself:

Arrow Image:
Attachment:
Arrow Image.jpg
Arrow Image.jpg [ 7 KiB | Viewed 3170 times ]


Heart Image:
Attachment:
Heart Image.jpg
Heart Image.jpg [ 6.76 KiB | Viewed 3170 times ]


Asset Image:
Attachment:
Asset Image.jpg
Asset Image.jpg [ 6.98 KiB | Viewed 3170 times ]

Author:  Alberto [ Fri Jun 29, 2012 7:04 am ]
Post subject:  Re: Color Depth Difference between Fancy Light Yellow and Y~

woha!!!! stunning cut!!!! 8) :D =D> =D> =D> =D> =D> =D>

i see only a side shifting on some pav main facets reflections.......

Author:  roshanravan [ Fri Jun 29, 2012 7:19 am ]
Post subject:  Re: Color Depth Difference between Fancy Light Yellow and Y~

Thanks Alberto 8) :wink: , its also big diamond (2.21ct)

let's continue on our main topic.

the reason i have started this topic is because for consumers the "Fancy" word itself can be tricky. but in reality there are slight difference between X~Z and FLY color depth mostly same, if cutter decide for a thicker girdle then it make stone from X~Z to FLY! and a lower cut quality diamond can be sold as fancy!

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