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 , a U.S. Navy ship HMS Tourmaline, later HMS Cassandra, a Royal Navy destroyer "Tourmaline", a 2017 song by Aye Nako from Silver Haze "TOURMALINE", a 2025 song by Earl Sweatshirt from Live Laugh Love