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Strong Blue Fluorescence. Which color/ clarity cost the least?

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chictomato

chictomato

Brilliant_Rock
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Hi there I would like to purchase a strong/ very strong blue GIA diamond of about half a carat weight. I would like to know which color and clarity combo cost the least? From my brief understanding. DEF colors are usually very much discounted. While GHI colors does not have much discount. I would like to know which color and clarity combo have the most discount for a strong blue fluro GIA diamond (assuming the triple excellent range) tks!
 
Date: 10/3/2009 11:12:15 AM
Author:chictomato
Hi there I would like to purchase a strong/ very strong blue GIA diamond of about half a carat weight. I would like to know which color and clarity combo cost the least? From my brief understanding. DEF colors are usually very much discounted. While GHI colors does not have much discount. I would like to know which color and clarity combo have the most discount for a strong blue fluro GIA diamond (assuming the triple excellent range) tks!
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Well I would assume colourless ( D E F) with medium or strong blue / VSB would have the most discount, or you could help the budget by looking at I or J colour and SI clarity if you can find one with the level of fluorescence you want, also you would have the added benefit that the SB could help the diamond face up a bit whiter too. Also you can look at AGS graded diamonds as well as GIA.
 
I remember it is the highest color and clarity grade is discounted the most.
 
Hi tks Lorelei and stone-cold!

I remembered seeing a chart in PS (if I am not wrong) stating the various discounts base on color and clarity. But I lost it
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So will a high color and clarity have more discount or a low color and clarity?
 
Date: 10/3/2009 11:20:33 AM
Author: chictomato
Hi tks Lorelei and stone-cold!

I remembered seeing a chart in PS (if I am not wrong) stating the various discounts base on color and clarity. But I lost it
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So will a high color and clarity have more discount or a low color and clarity?
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High colour usually will have more of a discount yes.
 
Seriously though... if a DEF gets a bigger discount, and the lower colors get less of one, wouldn''t that at some point level the playing field a little? The fluor will not always be visible (I have a D w/ sb fluor), so get a stone you like ALL the time, not just under UV light. Make sure it''s eye clean, but be happy with it''s true color too. Is this for you as a collectors item or will it be used in a jewelry piece? If it''s in a pendant color won''t matter as much, but if it''s in a ring where it will be visible all the time make sure the color of the stone itself is acceptable. hth -
 
My Infinity I1 S has strong blue fluorescence & was quite a bit less expensive than Infinities of the same size and higher colors/clarities...

I1Sfluo3.jpg
 
What a cool pic!
 
Date: 10/3/2009 11:50:09 AM
Author: glitterata
My Infinity I1 S has strong blue fluorescence & was quite a bit less expensive than Infinities of the same size and higher colors/clarities...

I1Sfluo3.jpg
Click to expand...
WAY kewl!!!
 
Date: 10/3/2009 11:53:34 AM
Author: ecf8503
What a cool pic!
Click to expand...

So''s yours, ecf!

But I don''t think the fluo in my S made it any cheaper. Unless it caused it to be graded S rather than Fancy Yellow, but I really doubt it. The low price was due to the low color/clarity, not the fluo (and the exquisite cutting made it more expensive than your average I1 S, I''m sure).
 
Agreed, Way, way kewl.
 
Higher colour grades have the biggest discount for very strong fluorescence - the discount seems to be greater as the fluorescence gets greater. Often, the small discount for the fluorescence in the best colour grades is overridden by other factors, such as cut and clarity.
I think that you'll have more than enough trouble finding a diamond that's suitable (well-cut, very strong fluorescent, F or better colour, VS or better clarity) without worrying about how much discount you might get.

In my opinion, if you're going to go for fluor, you might as well go "all the way" and go for "very strong" in a colourless grade.
Fluorescence is most visible from slight angles and in diffuse outdoor light (e.g. light shade) because if there's too much light, or you view the stone face-up, the light-reflection properties make the stone look near-white, in the same way as buying a superbly-cut J colour stone will "face-up" white because of the cut (in other words, the light reflection masks any colour tint).

If you buy a stone with "strong" fluor, just how strong is it? Is it just a little bit more than medium (which you might barely notice), or is it almost "very strong"?
By going for "very strong", you know that the fluor is at least a little stronger than strong. But you'll need some luck finding a well-cut, high-colour, eye clean stone with very strong fluor because they are few and far between.

Also be aware that a small number of stones have their appearance spoiled by the fluor - so make sure you ask whether the stone turns cloudy/murky/oily/milky/opaque (choose any of those words!) or has some other undesirable optical phenomenon associated with the fluorescence.
 
....and here's a picture of a very strong blue fluor, D, VS, 1ct, in hazy early-afternoon late-summer sun. Ambient UV was reported by weather stations to be "medium".
The stone was not subjected to any form of artificial illumination; all the blue that you see is being caused by sunlight.

more blue fluor 004b 031009.jpg
 
Here''s the same stone in a shady room, with no artificial UV being used - just natural daylight coming through an open doorway.
It was mid-afternoon in late summer. The sun was not shining into the room (the room faces East, the sun was in the West). The stone was several feet from the doorway.
You can still see slight traces of blue colour in the picture:

pear dvs shade3 001d 031009.jpg
 
Be clear.
Although an D may get an 8% discount for strong fluorescence it is still 53% more expensive than a J that gets no discount.

So the D is still much more expensive.


Note: these numbers are completely made up but the basic idea is sound, that the fluorescence discount is smaller than the premium you pay for a high clarity grade.
 
Date: 10/3/2009 11:50:09 AM
Author: glitterata
My Infinity I1 S has strong blue fluorescence & was quite a bit less expensive than Infinities of the same size and higher colors/clarities...

I1Sfluo3.jpg
Click to expand...
I''m a big fan of Fluor. I just think it''s cool. I would just search for the right stone and not worry about the Fluor. discount.

Glitterata -- that''s just such a stunning ring. And I love it in regular light too!
9.gif
 
Date: 10/3/2009 11:49:24 AM
Author: ecf8503
Seriously though... if a DEF gets a bigger discount, and the lower colors get less of one, wouldn''t that at some point level the playing field a little? The fluor will not always be visible (I have a D w/ sb fluor), so get a stone you like ALL the time, not just under UV light. Make sure it''s eye clean, but be happy with it''s true color too. Is this for you as a collectors item or will it be used in a jewelry piece? If it''s in a pendant color won''t matter as much, but if it''s in a ring where it will be visible all the time make sure the color of the stone itself is acceptable. hth -
Click to expand...

I intend to set it as a filigree halo ring. Simply like the blue:) but not the haziness. Will be getting a D-H color, VS1-SI1 clarity:) I am very much color sensitive (i mean to yellow) will probably not go lower than a H color.
26.gif
 
Thanks, StoneHunter!
 
Date: 10/3/2009 2:51:47 PM
Author: kenny
Be clear.

Although an D may get an 8% discount for strong fluorescence it is still 53% more expensive than a J that gets no discount.

So the D is still much more expensive.

Note: these numbers are completely made up but the basic idea is sound, that the fluorescence discount is smaller than the premium you pay for a high clarity grade.
Click to expand...

Exactly what I was going to say. Yes, a D/E/F may be relatively discounted more, but the price premium for high color is so great that the discount may not make up for this.
 
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