Black pendant necklace in white gold and diamonds

18k white gold (750/1000) necklace. Round pendant. Set in the center with a brilliant-cut white diamond of approximately 0.18 ct. Surrounded by 62 black diamonds totaling approximately 0.37 ct and 37 white diamonds totaling approximately 0.22 ct. Total diamond weight: approximately 0.77 ct. Length: 43 cm with an intermediate ring at 41 cm. Chain width: 0.14 cm. Pendant diameter: 2 cm. Total weight: 9.98 g. Hallmarked. Excellent condition.