sol·i·taire | ˈsä-lə-ˌter
A ring containing a single diamond or gemstone
A solitaire ring is one that contains just a single gemstone or diamond. The ring is often designed to showcase the single stone. While the term “solitaire” refers to any piece of jewelry that contains a single stone, it is most often used to refer to a ring with a single stone in it, and that often refers to a solitaire diamond. Solitaire engagement rings are particularly popular, dating back to the popular Tiffany round diamond engagement ring. After the brilliant round cut diamond, the princess cut is the second most popular type of diamond for the solitaire engagement ring.