5.69 Oval Cut Diamond Eternity Band in 18k Yellow Gold5. 69 Oval Cut Diamond Eternity Band in 18k Yellow Gold. This sparkling eternity band features 5. 69 carats of oval cut diamonds finished in polished 18 karat yellow gold. Around the entire band, eighteen (18) . 316 carat near colorless diamonds are set in shared prongs. Brilliant from every angle, the diamonds are set in yellow gold baskets, creating a striking contrast of colors. This lovely diamond band will pair well with most yellow gold