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An overview of tourmaline mineralogy......
https://gemologyonline.com/Forum/phpBB2/viewtopic.php?f=50&t=22576
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Author:  Barbra Voltaire, FGG [ Sat Apr 09, 2016 5:46 pm ]
Post subject:  An overview of tourmaline mineralogy......

I stumbled on this Master's Thesis from the University of Louisiana and thought it would be interesting to many of our tourmaline fans:
An overview of Tourmaline Mineralogy from Gem Tourmaline Producing Pegmatite Districts in Africa
http://scholarworks.uno.edu/cgi/viewcon ... context=td

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