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 Post subject: Color Depth Difference between Fancy Light Yellow and Y~Z
PostPosted: Thu May 31, 2012 11:38 am 
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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 .

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

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 Post subject: Re: Color Depth Difference between Fancy Light Yellow and Y~
PostPosted: Fri Jun 29, 2012 5:41 am 
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Has anyone ever seen X, Y, Z color diamond certificate?
Or, let's say, O-Z colors?
Do they really exist?

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

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 Post subject: Re: Color Depth Difference between Fancy Light Yellow and Y~
PostPosted: Fri Jun 29, 2012 6:20 am 
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@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

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 Post subject: Re: Color Depth Difference between Fancy Light Yellow and Y~
PostPosted: Fri Jun 29, 2012 6:28 am 
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also found a nice Q-R diamond which it has picture:
Attachment:
Q-R.jpg
Q-R.jpg [ 80.34 KiB | Viewed 3143 times ]

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 Post subject: Re: Color Depth Difference between Fancy Light Yellow and Y~
PostPosted: Fri Jun 29, 2012 6:35 am 
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wow Farshid, what a cut!!! 8) ist that an H&A??? guess yes!! :D
ciao
albé

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 Post subject: Re: Color Depth Difference between Fancy Light Yellow and Y~
PostPosted: Fri Jun 29, 2012 7:01 am 
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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 3141 times ]


Heart Image:
Attachment:
Heart Image.jpg
Heart Image.jpg [ 6.76 KiB | Viewed 3141 times ]


Asset Image:
Attachment:
Asset Image.jpg
Asset Image.jpg [ 6.98 KiB | Viewed 3141 times ]

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 Post subject: Re: Color Depth Difference between Fancy Light Yellow and Y~
PostPosted: Fri Jun 29, 2012 7:04 am 
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woha!!!! stunning cut!!!! 8) :D =D> =D> =D> =D> =D> =D>

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

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