Fluorescence

[jimboPD]

Hi,

Apologies if this has been answered already but how does fluorescence affect a diamonds look?

I have been offered a danielK cushion cut color F clarity IF at a very reasonable price however it has strong blue fluorescence...is this an issue and how much will it affect the look of a ring?

Thanks!

 

[Lorelei]

You can do a search for fluorescence as it has been discussed many times, but basically it is best to check with your vendor that the strong blue isn't causing any negatives in the diamond, this is very rare but on the odd occasion it can make a diamond look oily or cloudy - but not often. I take it this diamond has a GIA grading report? Your vendor will be the best person to advise you, but the chances are the diamond will be fine, also many do enjoy the effects of strong blue fluorescence and consider it can offer extra interest and appeal to their diamond. You may not notice the effects unless you are in strong sunlight anyway, also out of interest, in a lower colour grade such as I and below, many seek out fluorescence as they feel it can help the diamond face up whiter.

Also an expert vendor here has sold thousands of diamonds over the years, he has said that he has only ever seen negatives from strong blue fluorescence in a handful of stones, so again check with your vendor to be on the safe side, but most do not show any negative effects.

 

[chrono]

This might come in handy:
https://www.pricescope.com/community/threads/how-much-does-fluorescence-affect-diamond-quality.11962/

Just as a test for yourself to see the effects:
Take the diamond out into bright sunlight along with a similar color and cut diamond that has negligible or no UV fluorescence. Make a comparison yourself to see what it means to you. The strong fluorescence will likely show a lavender tint or a bit of cloudiness when the stone is in sunlight. If you can see this effect, then YOU decide if this is what you like. Not all strong fluoro stones will exhibit an oily or hazy look but some will. You don''t want a diamond that has this look.

The price will likely already reflect the 2 to 6 percent lower market price for this fluorescent effect. Expect to pay a bit more without UV fluorescence. There is no reason to avoid a stone with strong fluorescence and many PSers love the effect it has on diamonds.

 

[WinkHPD]

Date: 10/2/2007 3:03:29 PM
Author: Chrono
This might come in handy:
https://www.pricescope.com/community/threads/how-much-does-fluorescence-affect-diamond-quality.11962/

Just as a test for yourself to see the effects:
Take the diamond out into bright sunlight along with a similar color and cut diamond that has negligible or no UV fluorescence. Make a comparison yourself to see what it means to you. The strong fluorescence will likely show a lavender tint or a bit of cloudiness when the stone is in sunlight. If you can see this effect, then YOU decide if this is what you like. Not all strong fluoro stones will exhibit an oily or hazy look but some will. You don''t want a diamond that has this look.

The price will likely already reflect the 2 to 6 percent lower market price for this fluorescent effect. Expect to pay a bit more without UV fluorescence. There is no reason to avoid a stone with strong fluorescence and many PSers love the effect it has on diamonds.

LOL! Wish I had been more active then, I missed that whole fight and I would have weighed in gladly!

Personally I LOVE blue fluorescence and I sell a lot of stones with it. I absolutely love that the market gives a discount for something that enhances the beauty of the gem out of doors and especially at nightclubs! (So long as they are not overblues of course.)

Wink

 

[Kay]

Have you seen the diamond? Are you buying locally or online?

I have a D color diamond with medium blue, and I love the fluorescence. My appraiser said it was one of the whitest and crispest looking stones he had ever seen -- better than your average D. So, the blue flour may make your F look more like an E or D. For future projects, I will look for diamonds with medium to strong blue fluor.

It is rare for fluor to cause a problem (I think that may be an issue with very strong fluor, rather than strong, but am not an expert). Still, even without the fluor issue, I recommend that you only buy the stone if there is a return policy. I would not want to buy any diamond w/o being able to take it to an independent appraiser for an opinion before the sale is final.

 

[jimboPD]

I am buying locally - direct from danielk (i am in nyc) which makes me think it will be of very high quality - everything I have seen from them has been amazing. i have not seen the stone yet.