Necklace with diamond pendant 0.46ct 18K white gold

Necklace with diamond pendant in 18K white gold with a weight of 12.36 grams. The pendant has a width of 10.13 millimeters, a height of 5.65 millimeters, and is adorned with 31 natural octagon- and brilliant-cut diamonds with a total weight of 0.46 Carat and in quality H I.