For those that may be interested,I just put up U.S. Patent Number 4,749,86"
Process for irradiating Topaz and the product resulting therefrom."
at my website http://www.LICCINI.com It can be found under"Treating Tips
halfway down the page as Topaz(Neucler).
It contains all the technical info and some insight into the Topaz
business that ruled the world from the mid 1970's until late 1980's.Enjoy.
Gemstone Rough Dealers since 1970
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