Tourmaline

//ˈtʊɚ.mə.lɪn// noun

Definitions

Noun
  1. 1
    A complex black or dark-coloured borosilicate mineral, compounded with various chemical elements and considered a semi-precious stone. countable, uncountable

    "The floor of the chamber was tesselated, of marble and green tourmaline, and on every square of tourmaline was carven the image of a fish: as the dolphin, the conger, the cat-fish, the salmon, the tunny, the squid, and other wonders of the deep."

  2. 2
    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 wordnet
  3. 3
    A transparent gemstone cut from it. countable, uncountable

Etymology

From French tourmaline, ultimately from Sinhalese තෝරමල්ලී (tōramallī, “carnelian”)

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