Pendant necklace in white gold and diamond

18k white gold pendant with a round brilliant-cut diamond in a four-prong setting, approximately 0.70 ct. Chain length: 43 cm with an intermediate ring at 39 cm. Chain width: 0.14 cm. Fine curb link. Motif dimensions: 6 x 9 mm. Total weight: 4.07 g. Hallmarked on the end ring. Excellent condition.