Florescence in I Diamonds?

posted 1 year ago in Rings
Post # 2
7988 posts
Bumble Beekeeper

I also love fluor haha. It’s so cool! 

Very very very very few diamonds with strong fluor have negative side effects. They *can* appear milky, but the vast majority dont. 

It will only show up under UV light. So a bight sunny day you may notice a slight blue tinge, however most diamonds will also reflect colours it sees as well – ie a blue sky. So it may not appear that much different. 

It is highly unlikely anything would show in a dimly lit restaurant. Fluor is actived by UV light. There wouldn’t likely be any UV light in a dark restaurant.

The benefit of this though, is that an I will have some yellow tint. The blue will counteract that, and make the stone look brighter and whiter. I’ll grab some pics for you 🙂 Make sure to buy a UV light off amazon so you can test it out and see for yourself! 

eta – I put some pics below. IMO the blue will be seen pretty rarely for the most part. How often are you going to be out in direct sun staring and criticizing your ring? If you work an office job, you’re more likely to see it inside while typing and whatnot (like I am now lol). Unless you are a hardcore raver or go glow-in-the-dark bowling alot, you will very rarely see it under full UV light (hence why I say to get a light so you can see it!). Also, consider that to make this VSB in your diamond that there had to be the exact right mix of chemicals (normally boron) situated right next to the carbon and over millions of years it was compressed together to create your unique diamond. That’s one of my favourite things about fluor! 

Post # 3
781 posts
Busy bee

Aside from the typical “the higher the florescence the more it glows under UV light”, diamonds with higher levels of florescence are more likely to have a blue-ish hue in direct sunlight (not to be confused with the blue color reflecting from the sky).  Stones with higher levels of florescence really need to be evaluated on a case by case basis as they can sometimes (most say rarely) make a diamond appear hazy/less clear, which is why they are usually discounted vs. diamonds with lower levels of florescence.  But the only way to know is to see the diamond in various lighting conditions to see if the higher level of florescence are detrimental. GL

Post # 4
7988 posts
Bumble Beekeeper

Here is a J VSB, indoors and then outdoors in direct sun

Here is another J SB, indoors, outdoors, and under a UV light


Here is an I VSB, so very similar to what you will have


Post # 5
569 posts
Busy bee

Many, many years ago fluorescence used to be sought after and then someone decided it was bad.  My mom’s engagement ring is an antique cut with strong blue flourescence and it’s a beautiful diamond.  Walt until you get the ring and then decide for yourself.

Post # 6
20 posts

This is I colour with very strong fluorescent. Sparkles nicely. Has a blue-ish touch to it in very strong and direct sunlight. Normally it just appears whiter in sunlight. I think it’s cool – but I like “imperfections”

Post # 9
87 posts
Worker bee
  • Wedding: February 2022 - Edmonton, AB

I actually desire blue fluorescence in a stone. First of all, it improves colour… and second of all it’s like a hidden super-power. I also like that I’d be able to always know right away that it was my stone, and not actually swapped out by a jeweller by a quick flash of a UV light. I dunno, I think it’s really neat and beautiful.

Post # 10
2224 posts
Buzzing bee
  • Wedding: August 2018

PP’s have you covered on this one! I think you’ll absolutely love it and eventually forget it even has it. My F color diamond has medium blue fluorescence making it resemble an E color diamond! 

Post # 11
2 posts

 I’ve heard sone advise against getting a colorless diamond that has a strong blue  florescence  for fear that it will be milky or dull in direct sunlight. In my experience that couldn’t be farther from the truth at least with my specific diamond. I have a E color with the strong blue fluorescence  and no matter the lighting it’s sparkles like crazy. The icy blue hue that it gives off sometimes is actually what attracted me to the stone I think it’s so gorgeous here are some pics below where you can kind of see the variation in color.

Post # 12
3685 posts
Sugar bee

My boyfriend just recently told me about the diamond he bought and was excited that it had a strong blue fluorescence. I think he thinks it’s cool (he is a scientist) so he seems pretty excited about this aspect.

That is so very sweet! I love that he is emotionally invested in his own personal way 🙂 

As others have mentioned, I wouldn’t worry about it at all. And here’s a little fact list from the GIA:



Post # 13
38 posts
  • Wedding: November 2020 - Tulum, Mexico

Hi!  This is my diamond outside.  I color VSB. 

this one is indoors next to my sister’s D colored.

Post # 14
131 posts
Blushing bee
  • Wedding: July 2013

I love fluorescence!  To me, the effects aren’t as drastic as you may envision but it has a brightening effect that I just don’t see in my non-fluro stones.  This is my I color with strong fluorescence outdoors, where the UV is the strongest. 

Post # 15
20 posts

So I tried to take photos in different lights. In strong sunlight the stone does turn quite white, even with a touch of blue. Compare it to the side stones which are actually more or less the same colour. Stones with fluorescence are surprise stones, always look a bit different. I very much like the thought of them having a hidden superpower! And I think it’s so so lovely of your soon to be husband to put his science interest into your diamond. That is sweet! 

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