Tourmaline
Origin
Either directly from Sinhalese tóramalli 'carnelian', or via a cognate: German Turmalin, Portuguese tormalina, or French tourmaline
Full definition of tourmaline
Noun
tourmaline
(plural tourmalines)- A complex black or dark coloured borosilicate mineral.
- 2012-03, Lee A. Groat, Gemstones, 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.)
- A transparent gemstone cut from it.