Cabochon Coral & Diamond Earrings in 18k Yellow GoldCabochon Coral Diamond Earrings in 18k Yellow Gold. These modern coral and diamond earrings have a high polish and sparkle with their accent diamonds. Set in 18 karat yellow gold the earrings feature 1. 32 carats of highly refractive round brilliant diamonds set between large natural coral cabochon pieces. The accent stones are set in 18 karat white which further brightens the diamonds and embellishes the contrast with the rich coral and yellow gold.