Strong fluorescence affecting brilliance and fire?

[AndyDiamond]

Hi guys,

I went into a dealer today to compare a diamond with strong fluorescence that was brought in for me and ones he had on hand without. The one with strong fluorescence looked a lot more dull and lacked the sparkle, and fire of the non-fluorescence one. The seller insisted that is the result of fluorescence and thus suggest a diamond without it. I informed him of the GIA study that says otherwise, but he insists that anything but faint fluorescence would usually create less sparkle in the diamond except for smaller diamonds under 1 carat, and for lower colors (I or lower).

It seems most on this board think fluorescence has no affect on transparency. Did I just happen to see the rare unlucky overblue diamonds? Can anyone tell me if they own a strong or very strong fluorescence diamond and compared it side by side to a non-fluorescence diamond and see the same amount of sparkle and fire?

Thanks.

 

[yssie]

1. No, fluor doesn't actually cause haziness or any other effect (or if it does I haven't been able to reason why, or find anyone who will spell it out for me!), it's a combination of many factors (clouds for example) which fluor can exacerbate the appearance of. The GIA study you reference is very careful not to assign direct cause.
[URL='https://www.pricescope.com/community/threads/what-causes-haziness-in-some-stones-w-fluor.156221/']https://www.pricescope.com/community/threads/what-causes-haziness-in-some-stones-w-fluor.156221/[/URL]

2. Anything more than faint is problematic? I'd guess the hundreds of BGD Blue owners out there wouldn't hesitate to disagree! Yeah, um, he's full of it.

 

[0-0-0]

Please ditch the dealer/seller, he's giving you bad advice.

IMO if you are specifically looking for a stone with strong fluorescence without the negative effects, it's a lot safer to go with in-house/branded stones than the ones hanging out in the virtual lists. Strong fluorescence is relatively rare to begin with, and then there are people like me who look for the good ones. The ones hanging out in the virtual lists tend to be the rejects.

 

[TheGreatTwizz]

I just purchased a 2.43 ct stone with strong blue florescence, and it is more sparkly than any other stone I compared it to (dozens, literally). I wore this stone for days on my pinky (garnered some funny looks), and I only saw the flor under bright parking lot flood lights. Even under the UV at the jewelry store, it barely glowed, versus a VERY florescent stone the jeweler had set in his 'tester ring' that glowed bright. The advice you're receiving is poor and probably due to another motive.