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Possible to actually see strong blue fluorescence?

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princesultan

Shiny_Rock
Joined
Mar 20, 2012
Messages
106
I checked out a beautiful 1.38ct F SI1 cushion today. I thought it looked great and the price was also quite low at 6500$. There were 2 issues with the stone.

1 - the depth was 77% (although face up it looked quite big)
2 - there was a strong blue fluorescence

Now the jeweler told me that you can't see fluorescence unless it's under a black light. Is this true, because I can swear that I thought I saw some bluish tint to it when I was tilted it back and forth in the sun light. I didnt see any milkiness, at least I don't think.

What do you guys think? Can you see it in normal light?
 
My stone only has med blue fluoro, and is an I color (so more yellow to cancel out the blue), and I can still see a hint of blue in direct sunlight. I love it! But it's up to you/your fiancée to decide how you feel!
 
Any light source with a UV component can bring out flourescence, thought it is most pronounced in a dark environment with a "black light" to make the stone glow. But, yes, it is not unusual to see flour in daylight.
 
Bright sunlight will give it a blue glow that's really lovely.
 
I could be wrong, but I think it actually depends on which wavelengths any particular stone fluoresces to. If the wavelengths are closer to the visible light spectrum, I think it will be easier to see. I don't really see any effect of fluor on my G with medium blue unless I use my UV penlight. I could be wrong though.
 
My diamond has strong blue and I rarely see a hint of it in sunlight. But I do have a little UV light when I want to see it for fun!
 
My (D colour) diamond has no fluorescence, but in sunlight sometimes appears slightly blue - I assume it's reflecting the sky? So even if you think you're seeing some blue fluoro, it might just be normal diamond behaviour...
 
F is a pretty high color but the strong blue florescence is a huge bonus if it does not cause the stone to look cloudy or milky. Most love the blue hue it gives a stone in sun light. Check out the blue fl. on this stone ...gotta love it and lucky you...IMO. Would love a stone with strong blue fl....hubba hubba is right! You have to decide if you like it though...to each his own. GOG has a video on Florescence you should watch it. Jon states that in 99% of stones with Fl. it has no adverse effect...doesn't make it look milky or oily.

hope this helps...glad you found a stone locally that might be the one.

http://jewelsbyericagrace.smugmug.com/Jewelry/Rings-Antique-Vintage/356ct-Loose-Old-European-Cut/19804036_Qxwpx5#!i=1610940947&k=nKKGh89

AMAZING and rare 3.56ct Old European Cut diamond, EGL H, SI1 clarity (completely 100% eye clean!), with medium blue fluorescence! Look at that blue hue in the sun! Hubba, hubba, what a ring! EGL Report pending. Set in a beautifully simple vintage platinum solitaire with gorgeous prongs and basket details. Lovely facet pattern. Size 6.25, sizeable.
 
I have one F color diamond with strong blue fluor and I never see the color in the sunlight. My other F color diamond has medium blue fluor and it looks lavender in the sunlight. I agree that it probably depends on the exact wavelenths that a particular diamond fluoresces at as to whether you will see it in sunlight or not.
 
I have a D color w/ SB fluor (in my avatar under a black light), and in sunlight it turns a beautiful blue! I personally love the effect. :lickout:
 
I have a diamond with medium blue fluor and another with no flour.
When I bring them indoors and put them under a UV light source (aka a black light) the difference is tremendous, one glows blue and the other does not.

But when I bring them both into full sunlight, side by side, I see the same amount of blue in both.
This leads me to believe I'm just getting reflections from the huge blue sky.
 
I asked a diamond dealer the same question. He replied that "very very few" diamonds show blue under ordinary light. He also told me that less than 5% of strong blues exhibit milkiness. In other words, the fluorescence makes for a nice discount.
 
I have medium to strong blue in my stone and I can definitely see it on very bright sunny days. I wish I could get my camera to capture it.
 
In my experience with my AGS I color with strong blue fluorescence a blue tint can be visible in sunlight, although it's somewhat dependent on location and time of year. In San Diego and anywhere further south within the US a blue tint in sunlight is visible year-round. North of San Diego, the stone only shows a blue tint in the summer. The stone also shows a blue tint under some fluorescent lamps.

Here's a picture of my stone taken in the shade under some trees showing a subtle blue tint:
bluesara7.png

Here are some pictures comparing one with medium fluorescence against one with very strong fluorescence under strong sunlight: [URL='https://www.pricescope.com/community/threads/should-i-keep-this-very-strong-fluorescence-diamond-w-pic.147751/#p2669035']https://www.pricescope.com/community/threads/should-i-keep-this-very-strong-fluorescence-diamond-w-pic.147751/#p2669035[/URL]
 
One of the gemologists at Joe Escobar has a big diamond engagement ring with strong blue. They have HUGELY high ceilings (like 20 foot) and a wall of windows. When she stands near the window on a bright day -- even facing toward the store with no sky reflection-- her strong blue glows blue. I've seen it do it lots of times. Uncanny.

Beacon's 2 carat with Strong Blue does the same thing. No sky needed.

I've never seen a medium blue do it.
 
I wouldn't buy 77% - it is too deep and you loose too much face up size.
 
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