Roskin Gem News Report

Stone Group Laboratories
Cara & Bear Williams

Findings from Stone Group Laboratories shows the blue/white fluorescence in diamond can only be natural in origin.

Many gemstones fluoresce various colors depending on the elements or vacancies within.

Diamond Fluorescence can tell you a lot.  Look at these two images. Image #1 shows the violet Sri Lankan sapphire and diamond ring in typical daylight. Image #2 shows the ring under Long Wave Ultraviolet (LWUV).

Image #1 – Normal daylight

When you see that immediate blue/white fluorescence reaction in diamonds when using Long Wave Ultra Violet light, you can be confident that you are seeing a natural (earth mined) Type IaA diamond. 


Please know that this information only applies if the blue-white fluorescence is present. Not having this fluorescence to LWUV does not prove anything. Not all natural diamonds show visible blue-white fluorescence, so be careful not to judge non-fluorescing diamonds as lab grown.


Image #2 – Under LWUV

That blue white fluorescence is caused by aggregated nitrogen in what is referred to as the N3’s.

The graph below is a UV-visible spectrometer readout.

The main peak at the left is the 370nm energy produced by a long wave UV LED.

Resulting peaks to its right are the N3s fluorescing and returning that blue-white light back to you.

MAIN POINT:  N3s take millions of years to form in natural diamonds.  They cannot be reproduced in Lab Grown Diamond.

Roskin Gem News Report
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