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



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