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forrest79

'very Strong' Fluorescence On A G Color Diamond...should I Buy It??

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Hello everyone,

 

I am trying to decide on a diamond I have found online and everything looks good except for the fluorescence of the diamond, which is listed as very strong. This is also the reason why there is a decent discount in price on this diamond. I don’t care about the fluorescence as long as it will not affect the diamond under non-UV lighting and give it a hazy or milky appearance. Any thoughts you knowledgeable folks have on this will be much appreciated!!! Thank you.

 

Below is the specifications from the GIA certification.

 

Cut: Excellent

Color: G

Clarity: VS2

Depth: 61.7%

Table %: 56%

Polish: Excellent

Symmetry: Excellent

Gridle: Medium to slightly thick (3.5%)

Cutet: None

Fluorescence:Very Strong Blue

Measurements: 8.33 x 8.27 x 5.12 mm

Crown height: 14.5%

Crown angle: 33 degrees

Pavilion angle: 41.4 degrees

Pavilion depth: 44%

Edited by forrest79

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Bear in mind that no matter what the level of fluorescence, this won't matter unless the lighting source has a significant UV component. This basically means natural light, discos or tanning salons. A strongly fluorescent diamond will also look extremely cool in the latter two environments. :)

 

As to the haziness/oiliness of certain stones: it can happen, but there is no way of telling without actually seeing the stone. It is rarer than one may think, too. My suggestion would be to get the stone on the clear understanding that you can return it within 15 days (or more) for any reason, and look at it in natural sunlight. If it gets hazy, you WILL see it, trust me!


Davide - Specialised Consumer Information and Assistance,
Diamonds by Lauren (http://www.diamondsbylauren.com)
davide@diamondsbylauren.com

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David - LOL i guess i wont have trouble spotting my GF at a disco club then :) What do you think of the other specifications for this diamond? does it look good on paper at least?

 

Thanks for your reply!

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It looks good on paper. Couple of points to watch: is that girdle hiding some weight? Is the diamond well cut and optically "working"? A GIA 'Excellent' cut grade is a good point to start from, but they don't all look the same!


Davide - Specialised Consumer Information and Assistance,
Diamonds by Lauren (http://www.diamondsbylauren.com)
davide@diamondsbylauren.com

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Hazy, oily, and/or opaqueness in strong blue is less than 1/2 of 1%.

 

A must read on the affects of fluorescence on diamond face up transparency and color is the study done by GIA in 1997 that is the best set of experiments ever done. The results and conclusions run counter to today's accepted dogma/beliefs.

 

The link is here:

 

http://lgdl.gia.edu/pdfs/W97_fluoresce.pdf


Barry
www.exceldiamonds.com
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thanks david & barry!

 

I think what i will do is have the vendor send the diamond to me and compare it side by side with a F color, VS2, excellent cut, medium fluorescence diamond and see if i can tell a difference between the two.

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Hello everyone,

 

I am trying to decide on a diamond I have found online and everything looks good except for the fluorescence of the diamond, which is listed as very strong. This is also the reason why there is a decent discount in price on this diamond. I don’t care about the fluorescence as long as it will not affect the diamond under non-UV lighting and give it a hazy or milky appearance. Any thoughts you knowledgeable folks have on this will be much appreciated!!! Thank you.

 

Below is the specifications from the GIA certification.

 

Cut: Excellent

Color: G

Clarity: VS2

Depth: 61.7%

Table %: 56%

Polish: Excellent

Symmetry: Excellent

Gridle: Medium to slightly thick (3.5%)

Cutet: None

Fluorescence:Very Strong Blue

Measurements: 8.33 x 8.27 x 5.12 mm

Crown height: 14.5%

Crown angle: 33 degrees

Pavilion angle: 41.4 degrees

Pavilion depth: 44%

 

 

 

The very strong fluorescence is a concern as mostly the stones that get that are kind of oily or milky. Also I wouldn't say that the numbers on the paper are not all that great either. I would say to look for a better stone. This one is priced low for a reason. You should definitely look at the stone before buying with a very strong flourescence.

Edited by jan

Jan

For those that want to know the truth about diamonds, just ask.

 

dbof.com

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The very strong fluorescence is a concern as mostly the stones that get that are kind of oily or milky.

 

I absolutely disagree with this statement. A FEW of the stones graded very strong in fluorescence will show a milky or oily appearance in sunlight but it's the exception, not the rule.

 

Strong fluorescence has a substantial downward affect on prices, and for most people that's a good thing, but do make sure to actually look at the stone in sunlight before the deal is cemented in order to rule out the 'overblues' that you're worrying about. You didn't give the price but you probably don't want one, even at a nice discount if this is the case.

 

There's a nice article about fluorescence in the 'articles' section of this site that might be helpful.

 

Note: I DO want one to include in my fluorescence masters and am having a hard time finding it. They're hard to find, even when you're trying.

 

Neil


Neil Beaty

GG(GIA) ICGA(AGS) NAJA

 

There's never a crowd when you go that extra mile.

Professional Appraisals in Denver

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The very strong fluorescence is a concern as mostly the stones that get that are kind of oily or milky.

 

I absolutely disagree with this statement. A FEW of the stones graded very strong in fluorescence will show a milky or oily appearance in sunlight but it's the exception, not the rule.

 

Strong fluorescence has a substantial downward affect on prices, and for most people that's a good thing, but do make sure to actually look at the stone in sunlight before the deal is cemented in order to rule out the 'overblues' that you're worrying about. You didn't give the price but you probably don't want one, even at a nice discount if this is the case.

 

There's a nice article about fluorescence in the 'articles' section of this site that might be helpful.

 

Note: I DO want one to include in my fluorescence masters and am having a hard time finding it. They're hard to find, even when you're trying.

 

Neil

 

 

 

It's possible it may not be oily or hazy..... but a large discount with a very strong fluorescence indicates to me as a vendor a red flag. I would want to see the stone before a purchase on that. Coupled with the deep pavilion, you may not have the brightest bulb on the tree, hence the price. There are reasons stones are highly discounted. Not all VS1's run the same price.


Jan

For those that want to know the truth about diamonds, just ask.

 

dbof.com

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The very strong fluorescence is a concern as mostly the stones that get that are kind of oily or milky.

 

I absolutely disagree with this statement. A FEW of the stones graded very strong in fluorescence will show a milky or oily appearance in sunlight but it's the exception, not the rule.

 

Strong fluorescence has a substantial downward affect on prices, and for most people that's a good thing, but do make sure to actually look at the stone in sunlight before the deal is cemented in order to rule out the 'overblues' that you're worrying about. You didn't give the price but you probably don't want one, even at a nice discount if this is the case.

 

There's a nice article about fluorescence in the 'articles' section of this site that might be helpful.

 

Note: I DO want one to include in my fluorescence masters and am having a hard time finding it. They're hard to find, even when you're trying.

 

Neil

It's possible it may not be oily or hazy..... but a large discount with a very strong fluorescence indicates to me as a vendor a red flag. I would want to see the stone before a purchase on that. Coupled with the deep pavilion, you may not have the brightest bulb on the tree, hence the price. There are reasons stones are highly discounted. Not all VS1's run the same price.

Jan,

 

We don't know the price, only that the dealer told him that it was a discount. As you know, this can mean all sorts of different things. I stand by my contention that MOST very strong fluorescent stones do not show the dreaded oily or hazy appearance under anything like normal viewing conditions, including sunlight.

 

Neil


Neil Beaty

GG(GIA) ICGA(AGS) NAJA

 

There's never a crowd when you go that extra mile.

Professional Appraisals in Denver

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The 1997 GIA study on fluorescence found that hazy, oily, opaque effects of strong fluorescence is a rare occurrence.

 

The price discounting was a singular market situation that GIA discusses and that has unfortunately carried on, not to a direct relationship/effects of FL on face up transparency.


Barry
www.exceldiamonds.com
@Exceldiamonds on Twitter

Excel Diamonds on Facebook

sales@exceldiamonds.com
1-866-829-8600
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hi all,

 

the diamond is priced at around 9740 per carat...so i guess its a pretty good price...do you guys think its too good to be true? I will be getting the diamond tomorrow so will let you all know how it looks...

 

Jan - you mentioned the pavilion is too deep...i read that the ideal depth is 43.1%..does the 0.9% make a big difference?? :)

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Hello!

 

I guess your mind is already set on this on. Conduct your own observation, and if you're not pleased, I hope you can return it in less than a month. Keep us posted & don't forget to post a pic...

I'm just wondering, are you still open to look for more stones?

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hi all,

 

the diamond is priced at around 9740 per carat...so i guess its a pretty good price...do you guys think its too good to be true? I will be getting the diamond tomorrow so will let you all know how it looks...

 

Jan - you mentioned the pavilion is too deep...i read that the ideal depth is 43.1%..does the 0.9% make a big difference?? :)

 

 

I was looking at the 41.4 pavilion angle. I generally don't get too good of results with light performance with diamonds in this range. Each stone is individual though.


Jan

For those that want to know the truth about diamonds, just ask.

 

dbof.com

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hello again,

 

i was able to take some pictures of the diamond...please let me know what you guys think! i am not sure if its just all in my head but i feel like i can see a bluish hue on the diamond even when its not under direct sunlight...it looks clear but there is a bluish hue to it....is this normal? here are the pics:

Note: the smaller diamond is a Excellent cut, F color, VS2, medium fluorescence diamond

 

At home under natural light:

 

IMG_0799.JPG

IMG_0801.JPG

IMG_0803.JPG

IMG_0804.JPG

IMG_0807.JPG

IMG_0808.JPG

 

under the sun outside the balcony:

 

IMG_0812.JPG

IMG_0813.JPG

IMG_0814.JPG

IMG_0817.JPG

Edited by forrest79

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here are some pics under the bathroom fluorescence light. I have to say it looks more blue in the pics than in actual person :IMG_0875.JPG

 

 

 

IMG_0868.JPG

 

IMG_0878.JPG

Edited by forrest79

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Looks good.


Barry
www.exceldiamonds.com
@Exceldiamonds on Twitter

Excel Diamonds on Facebook

sales@exceldiamonds.com
1-866-829-8600
1-212-921-0635

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Those rings are gorgeous!:)

 

 

And I'm also seeing that bluish hue, the rock is so huge, it looks so fab, and just like you said.. too good to be true. But I think the small one sits perfectly., it feels so right for you.

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With strong blue fluorescence in an essentially colourless stone, you will see blue reflexes dominating if there is some UV in the light (and the jeans don't help, BTW :)). The main thing is that it is very far from looking oily or hazy.

 

One question - prompted by the first two photos: does it look as if it has a "glassy", darker centre? It may just be the angle and lighting in the photo, and it certainly looks very sparkly (and huge) in the others, but if this effect is prevalent, it is what Jan was referring to with her comments on pavillion angle and depth.


Davide - Specialised Consumer Information and Assistance,
Diamonds by Lauren (http://www.diamondsbylauren.com)
davide@diamondsbylauren.com

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Looks like what I would expect from a very strong blue. I do see some haze to the stone in quite a few of the photos.


Jan

For those that want to know the truth about diamonds, just ask.

 

dbof.com

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I too see some of what looks like the telltale haze in a few of the pictures although I'm less confident that it's there without knowing more about the lighting conditions and the photography. Look at it under direct sunlight, without cloud cover and without filtering the light through glass of unknown optics. Look from the back as well as from the top. Obviously be sure the stone is squeeky clean when you do this. If it looks like there's frost on the stone or that there's a fog in the middle of it, then you've got an 'overblue'. It should be quite obvious if you set up the conditions.

 

What size is this stone?

 

Neil

Edited by denverappraiser

Neil Beaty

GG(GIA) ICGA(AGS) NAJA

 

There's never a crowd when you go that extra mile.

Professional Appraisals in Denver

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Hi all, thanks for all your responses!

 

i looked at it under direct sun again and i dont believe there is a haziness to it...all i see is a blue hue...here are some pictures

 

davide - you are really close :) the diamond is 2.14 carat and priced at 20738. the pics are taking under strong direct sunlight:IMG_0899.JPG

IMG_0902.JPGIMG_0906.JPG

 

IMG_0906.JPGIMG_0904.JPG

 

IMG_0904.JPG

Edited by forrest79

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