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Tourmaline   /tˈʊrməlˌin/   Listen
Tourmaline

noun
(Written also turmaline)
1.
A mineral that is a complex borosilicate and hydroxide of aluminum containing iron and magnesium and calcium and lithium and sodium; it is usually black but occurs in transparent colored forms that are used as gemstones.





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"Tourmaline" Quotes from Famous Books



... showed off a few simple experiments to amuse her—made crystal trees, a shower of snow, a heavy stone out of two empty-looking bottles, spilt mercury and set her to gather it up again, showed her prisms, and made her look through a bit of tourmaline, and in every way conceivable to him strewed the path of learning with flowers—then she began to feel a little interest in the place and left off making wry faces at the dirt and ...
— Lippincott's Magazine of Popular Literature and Science, Vol. 17, - No. 97, January, 1876 • Various


Words linked to "Tourmaline" :   schorl, transparent gem, mineral


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