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BROWN TOURMALINE: Earth Tone Poems.(Gem Profile)
Modern Jeweler
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May 1, 2007
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BROWN TOURMALINE: Earth Tone Poems
BY DAVID FEDERMAN, CONTRIBUTING EDITOR
If you think garnet is a complex gem, try figuring out to which of the many branches of the tourmaline family the bronze, butterscotch, and cinnamon tourmalines we've been seeing in heaping numbers lately belong. There are at least three slots open: dravite, uvite, or buergerite.
I'd never heard of the last of that trio until I read R.V. Dietrich's The Tourmaline Group, published by Van Nostrand Reinhold in 1985. Described by the author as exclusively orangey-brown, he cites ...
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