Emeralds and UV Light

starsplitter

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Mike:

Test #6 is interesting - the long and short wave UV responses. Thanks.

Starsplitter
 

What I read is it's the additives that produce the florescence. I know sapphires mostly do not, but a few have a red glow.
 

I wonder if you used a magnifying glass and the sun could you get good results?
 

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