Intriguing cutwork and a two-tone mounting set this 1920s antique diamond filigree engagement ring apart. The 18k yellow gold band of this antique ring is topped with a hexagonal 18k white gold top. Pierced coronets and scroll work highlight the band. Inside the hexagonal top setting is a round brilliant cut diamond. This diamond centerpiece weighs 0.25 carats. This antique engagement ring is circa 1920.