5.12 Oval Cut Diamond Band in 18k White Gold5. 12 Oval Cut Diamond Band in 18k White Gold. This eternity band features 5. 12 carats of oval cut diamonds finished in shimmering 18 karat white gold. Around the entire band, seventeen (17) . 301 carat near colorless diamonds are set in shared prongs. Scintillating from every angle, the diamonds are finished in cool white gold, creating a streamlined band that will pair well with most engagement rings or in a stack of bands.