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Noun: tourmaline  'tûr-mu,leen or 'tûr-mu-lin [N. Amer], 'tor-mu,leen or 'tûr-mu,leen [Brit]
  1. A mineral that is a complex borosilicate and hydroxide of aluminium containing various elements; occurs in transparent coloured forms used as gemstones
    "She wore a necklace featuring a stunning pink tourmaline"

Derived forms: tourmalines

Type of: mineral, transparent gem

Encyclopedia: Tourmaline