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3 Carat pear, Si1, I color, strong flouresence

Uncle dodo

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Hi there, I recently purchased from an online store (it will take 2 weeks for me to receive) when i visited the show room i selected 3 diamonds first and i made my comparison. After choosing the most visibly appealing noticed that even though I did so much research I left out research on fluorescence and this diamond is GIA certified “strong blue”, excellent polish .

The diamond did not look milky, it was actually very beautiful. I sat it next to a D color, VVS and it was still very stunning. 

The only problem is that I only looked at it in their show room, we did not take the ring out for direct sunlight to hit it. 


Can anyone one give me any input? When this hits direct sunlight, will it turn blue? Idk if I like that  


Edited by Uncle dodo
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Well, the problem is that if you only looked at the stones under indoor lighting that tells you absolutely nothing about how fluorescence will affect its looks where enough UV is present, so the fact that it didn't look milky under spotlights means... absolutely nothing other than it's a lovely stone under spotlights. On the other hand, milkiness due to fluorescence is actually quite rare: http://www.gia.edu/gems-gemology/winter-1997-fluorescence-diamonds-moses

It definitely won't turn "blue", but a blue tinge may be apparent in some conditions, depending on how strong the fluorescence is. For a few photos illustrating what may happen, look here:

At this point, since you still haven't taken delivery of the stone, figure out what the return conditions are, and if necessary negotiate with the vendor what you could do if you don't like it.

Edited by davidelevi
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The worry about fluorescence in diamonds is a problem called ‘overblue’.  Here’s how it works. Fluorescence means when you shine a UV light, which is invisible to the eye, the stone generates light that *IS* visible.  Normally, that isn’t a problem.  More visible light coming back it you is a good thing, not a bad one.  The problem comes when the internally generated light, meaning the fluorescence stuff, is brighter than the reflected light, which is what you’re used to seeing.  The sparkle, which comes from the myriad of reflections in the stones gets overshadowed.  It’s not blue as much as a cloudy effect like looking at a bright light through a fogged lens. 

Realistically, the only environment where you’ll see it is direct, unshaded, sunlight. The problem is that the sun is a decidedly bright light source, and it takes a lot of fluro to offset it.  It’s a tiny fraction of the strong blue’s that can do this, even to the point of being detectable. They do exist, but they're a lot more scarce than people think.  I look at diamonds every day and I haven’t seen one in years for example.  Your risk really is pretty low but the test is simple enough.  Take a look at it in the sun when you get a chance.

I’m curious about your transaction. You mentioned that you bought it from an online store but that you looked at it in their showroom.  Why is it taking 2 weeks to deliver it?

Edited by denverappraiser
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Thanks to everyone who responded. I appreciate any other feedback. 

I am from a California and went on a trip to NY, I coordinated 3 stones to view the weekend i was there and I actually chose the one I thought that was best looking. It still needs to be set, I viewed loose diamonds so it will take 2 weeks for me to receive  

Its from James Allen, I guess I will just have to wait and do the test. They do have a money back, refund guarantee. 

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Can I ask for your opinion? I chose this diamond because it was actually very beautiful, I failed to research the difference and unfortunately I already paid for the ring to be made. No big deal with James Allen I know I can return it. But right now I’m debating perception, will the fact that the diamond has  “fluorescence” give the perception that I was being cheap? I mean, it’s a $30k rock man...  lol. 

Edited by Uncle dodo
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You chose the diamond for absolutely the right reasons. Any 3 carat diamond that is decently cut and isn't full of black schmutz is definitely not going to give the perception that it is cheap.

I would count fluorescence as a rather arcane thing for the average person looking at a diamond on someone else's hand: they probably don't know how to spell the durned word. Did you read the study on fluorescence by GIA that I linked in my first response? One of the main findings was that people (both the general public and "diamond experts") tended to like fluorescent stones more than equivalent non-fluorescent ones.

I wouldn't worry too much. The reasons fluorescence is perceived as a "problem" and therefore fluorescent stones trade at a discount are basically 3:

1. The (remote) possibility that the stone is an "overblue" and turns hazy/milky in sunlight.

2. The (about as remote) possibility that the stone has been overgraded in colour.

3. The fact that the stone will change appearance "more than usual" in different lighting environments (see the photos I linked above), and some people don't like that.

Of these 3, #2 is a purely financial consideration (and actually stones that have been overgraded tend to trade at a discount reflecting the overgrading), since you have seen the stone against other, higher colour ones, and you preferred this one.

#1 is a very remote possibility (GIA could not find enough "overblues" to include them in a study that examined over 1000 diamonds!), but it is easily detected. That one is 

#3 is a personal preference rather than a "cheapness indicator" - I quite like the effect in near-colourless stones, but I am less keen on it on yellow diamonds. 

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