Last Updated: Oct 16, 2016 Views: 53
I asked Dr. Robert Brill, our retired Research Scientist, for advice with your question. He replied:
"The fluorescence sounds like it could be from a rare earth (or something similar). Or possibly it could be from some thin-film iridescent coating on the surface?"
I hope this answer is helpful.
For more information about rare earth elements I attached a bibliography for coloring glass.
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