Fluorescent Diamond Question

[FB.]

Does anyone know the mechanism that causes fluorescence (especially blue) in diamonds?

Does the fluorescence of a diamond fade after many years of exposure to UV light?

If the fluorescence fades, does it leave chemical changes within the diamond, such as microscopic inclusion-like scarring in the diamond that might reduce the clarity grade or impair light passage?

The reason I ask is that many fluorescent things tend to lose their fluorescence over a period of time.
To my interpretation, the fluorescence ought to be requiring "fuel" to create that light - caused by reactions within the diamond - which might be permanent reactions.

Thanks for any input!

FB.

 

[stone-cold11]

Read this article?

https://www.pricescope.com/community/threads/blue-fluorescence-in-diamonds.117782/

No, it doesn't fade. It is not due to a chemical reaction.

It doesn't create light, it absorb higher wavelength light, in this case UV, and re-emit as a lower wavelength, blue.

 

[Lorelei]

Date: 6/29/2009 7:04:27 AM
Author:FB.
Does anyone know the mechanism that causes fluorescence (especially blue) in diamonds?

Does the fluorescence of a diamond fade after many years of exposure to UV light?

If the fluorescence fades, does it leave chemical changes within the diamond, such as microscopic inclusion-like scarring in the diamond that might reduce the clarity grade or impair light passage?

The reason I ask is that many fluorescent things tend to lose their fluorescence over a period of time.
To my interpretation, the fluorescence ought to be requiring 'fuel' to create that light - caused by reactions within the diamond - which might be permanent reactions.

Thanks for any input!

FB.

This is a good link which explains - http://diamonds.pricescope.com/fluor.asp

Fluorescence is permanent in diamonds and does not fade. The main thing to watch out for in strong or very strong blue is that on rare occasion it can make the diamond look cloudy in some lights ( see the example in the link I posted above) but this is unusual.

And welcome to Pricescope

 

[FB.]

Thanks for the speedy replies, the links and for the welcome.

The diamond in the rim-set ring - shown in a couple of the links - doesn''t appear to have it''s vital stats listed (well, I couldn''t see them). Do you know what the diamonds stats are?

Thanks
FB

 

[Lorelei]

Date: 6/29/2009 7:40:25 AM
Author: FB.
Thanks for the speedy replies, the links and for the welcome.

The diamond in the rim-set ring - shown in a couple of the links - doesn't appear to have it's vital stats listed (well, I couldn't see them). Do you know what the diamonds stats are?

Thanks
FB

I will try and find out for you, I know it is large and has very strong blue fluorescence, it belongs to one of our experts David Atlas aka OldMiner. David will probably be along presently and should see this thread.

 

[denverappraiser]

Date: 6/29/2009 7:04:27 AM
Author:FB.
Does anyone know the mechanism that causes fluorescence (especially blue) in diamonds?


Does the fluorescence of a diamond fade after many years of exposure to UV light?


If the fluorescence fades, does it leave chemical changes within the diamond, such as microscopic inclusion-like scarring in the diamond that might reduce the clarity grade or impair light passage?


The reason I ask is that many fluorescent things tend to lose their fluorescence over a period of time.

To my interpretation, the fluorescence ought to be requiring ''fuel'' to create that light - caused by reactions within the diamond - which might be permanent reactions.


Thanks for any input!


FB.

The ‘fuel’ is the UV light source you’re shining on it.

Neil Beaty
GG(GIA) ICGA(AGS) NAJA
Professional Appraisals in Denver

 

[Garry H (Cut Nut)]

Date: 6/29/2009 9:11:14 AM
Author: denverappraiser

Date: 6/29/2009 7:04:27 AM
Author:FB.
Does anyone know the mechanism that causes fluorescence (especially blue) in diamonds?


Does the fluorescence of a diamond fade after many years of exposure to UV light?


If the fluorescence fades, does it leave chemical changes within the diamond, such as microscopic inclusion-like scarring in the diamond that might reduce the clarity grade or impair light passage?


The reason I ask is that many fluorescent things tend to lose their fluorescence over a period of time.

To my interpretation, the fluorescence ought to be requiring ''fuel'' to create that light - caused by reactions within the diamond - which might be permanent reactions.


Thanks for any input!


FB.

The ‘fuel’ is the UV light source you’re shining on it.

Neil Beaty
GG(GIA) ICGA(AGS) NAJA
Professional Appraisals in Denver

The UV energy causes electrons in the outer shell to jump further out, and as they fall back the spent energy is given off as blue light (in most cases, but can be yellow and other colours)