These elegant and playful diamond earrings from the Mappin & Webb Empress collection feature 0. 37 carats of round brilliant-cut diamonds set In a delicate 18 carat white gold surround. Each stud measures 10mm (0. 39 inches) across and has a post and butterfly fastening. A sparkling and versatile diamond pendant, set with 0. 40 carats of round brilliant-cut diamonds in 18 carat white gold on a 46cm (18 inch) chain adjustable to 40. 5cm (16 inches). The motif measures 15mm (0. 59 inches) in diameter.