tourmaline

From French tourmaline, ultimately from Sinhalese [script needed] (stóramalli, “carnelian”).

IPA^(key): /ˈtʊəɹməliːn/

tourmaline (countable and uncountable, plural tourmalines)

1. A complex black or dark-coloured borosilicate mineral, compounded with various chemical elements and considered a semi-precious stone.
   • 2012 March 1, Lee A. Groat, “Gemstones”, in American Scientist‎, volume 100, number 2, 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.

• moluranite

tourmaline f (plural tourmalines)

1. tourmaline

• “tourmaline” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).