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Defenition of the word tourmaline

    • Defenition of the word tourmaline

      • 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

    Hyponyms for the word tourmaline

      • schorl

    Hypernyms for the word tourmaline

      • mineral
      • transparent gem

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