Noun: tourmaline 'tûr-mu,leen or 'tûr-mu-lin [N. Amer], 'tor-mu,leen or 'tûr-mu,leen [Brit]
- A mineral that is a complex borosilicate and hydroxide of aluminium containing various elements; occurs in transparent coloured forms used as gemstones
"She wore a necklace featuring a stunning pink tourmaline"
Derived forms: tourmalines
Type of: mineral, transparent gem
Encyclopedia: Tourmaline