tourmaline

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

• IPA^(key): /ˈtʊɚ.mə.lɪn/, /ˈtʊɚ.məˌlin/

tourmaline (countable and uncountable, plural tourmalines)

1. (mineralogy) A complex black or dark-coloured borosilicate mineral, compounded with various chemical elements and considered a semi-precious stone.
   • 2012 March, Lee A. Groat, “Gemstones”, in American Scientist‎, volume 100, number 2, archived from the original on 14 June 2012, page 128:

     Although there are dozens of different types of gems, among the best known and most important are […] . (Common gem materials not addressed in this article include amber, amethyst, chalcedony, garnet, lazurite, malachite, opals, peridot, rhodonite, spinel, tourmaline, turquoise and zircon.)

2. A transparent gemstone cut from it.

• luxulyanite
• Mohrenkopf

• moluranite

• IPA^(key): /tuʁ.ma.lin/

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tourmaline f (plural tourmalines)

1. tourmaline

• “tourmaline”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.