Tourmaline (disambiguation)
Tourmaline is a crystalline boron silicate mineral
- Tourmaline (activist) (born 1982), American activist, filmmaker, and writer
 - Tourmaline (band), an American rock band
 - Tourmaline (novel), a 1963 novel by Randolph Stow
 - Tourmaline Surfing Park, a public beach in San Diego, California, U.S.
 - HMS Tourmaline (J339), a Royal Navy minesweeper
 - USS Tourmaline, a U.S. Navy ship
 - HMS Tourmaline, later HMS Cassandra, a Royal Navy destroyer
 - "Tourmaline", a 2017 song by Aye Nako from Silver Haze