Fluorescence

[Maggie May]

Hi all,

Can some of the experts chime in here and educate me

I'm looking into upgrading my existing engagement ring and the budget is quite tight so I was wanting to go down the path of a J coloured diamond. What would be the impact of a blue fluorescence be on the stone ? would it be a positive ?

Thanks soo very much, I'm very confused about the opinions regarding fluorescence.

MM

 

[stone-cold11]

do not depend on it to cover up the tint in all situation as it is only activated in the presence of UV light source.

I guess you have read this article?
https://www.pricescope.com/journal/blue_fluorescence_diamonds

 

[WinkHPD]

In a J color the blue fluorescence is a positive factor out of doors and in lights that contain fluorescence. It will have from 0% to +2% influence on the price depending on the strength and how it affects the visual appearance of the stone. (According to the latest Rapaport report which I recieved only yesterday.)

What is more important to the appearance than the fluorescence is the cutting of the gem. If the stone is properly cut so that the light enters, reflects twice and exits, then the diamond will appear whiter than if the stone is poorly cut and the light bouncing around many times before exiting having absorbed more of the diamond's color. Of course a poorly cut gem will also exhibit less brilliance and scintillation as well, making the color really a fairly mute point.

Wink

 

[piratefan]

Maggie May,

It really depends on your own personal color sensitivity as well as the cut and perphaps shape of the stone. I personally *thought* I was color sensitive due to my experience of seeing an "I" colored asscher from a local B&M store. It seemed very tinted to me. However, this is mostly likely due to the shape-asscher is a step cut and I believe it is easier to see tint in these shapes; but also due to it not being a very well cut asscher, it was not "bright." However, after reading up more here on PS I feel in love with the GOG August Vintage Cushion and ended up with an "L" colored stone. I am very happy with this decision. Yes it is not "icy white" but it does not appear "yellow" and in most lighting it is reasonably very white. Have you seen the pics in SMTB with pics of my mom's new August Vintage Round? It is also an L but contains very strong flouro...here are some pics just to show you the effects of the VSFlouro on a warmly colored stone. Good luck with your decision.

 

[coati]

More on Fluorescence here: https://www.pricescope.com/wiki/diamonds/diamond-flourescence

Some seek fluorescence in their diamonds-particularly those that are near colorless (IJ) or faint (KLM). As Wink stated, it depends on how well the stone is cut and the strength of the fluorescence, but a well cut J with blue fluor is generally a positive.

 

[oldminer]

Fluorescence is a tricky devil. Sometimes it really can make a slightly off-color diamond look whiter, or a bit more blue when the UV is just right. Sometimes, the diamond may take on a little or a lot of an oily loss of pure transparency as the fluorescence shows itself. On some diamonds the fluorescence actually happens when light above UV actually excites the stone. My own diamond glows like crazy with 415 range light which is near UV, but not UV exactly. It also has a somewhat different fluorescent reaction to actual UV lighting.

I suppose what I am telling you is that you can't really make general rules about what fluorescence will do with a particular diamond. Every diamond is an individual to some extent and what works for many may not work for the one you might select. You'll have to examine the particular diamond to know how it helps or does not help the apparent color. As you have already been advised, the quality and style of cutting will have a large impact on the visual color appearance, too.

 

[Maggie May]

Thank you so much everyone - i've taken it onboard and made a selections and don't think I'll rule out stones with a fluorescence - it sounds like a positive factor.

Piratefan THANK YOU for the pics - absolutely beautiful and thanks for taking the time to post the pics - I really appreciate it.

 

[sillyberry]

MaggieMay, I have a H color cushion with strong fluorescence. When I compared it to other G and H stones, I found it to be significantly whiter, although in some lights it still takes on a yellowish tint. It was definitely a positive factor in choosing that stone!

 

[TotalNewbie]

Hope this photo helps:

Top stone is 1.34ct J color stone, ex/ex/ex, GIA, no fluoro

Bottom stone is 1.34ct I color stone, ex/ex/ex, GIA, VERY strong blue fluoro (on GIA Certificate)

I love the fluoro. As you can see, it is visible as shown in sunlight in the photo, not visible indoors or in shaded sunlight. I started a thread on this a few months ago, it's up there somewhere.

Good luck and happy shopping