Pendant necklace in yellow gold and opal

18k yellow gold (750/1000) necklace set with a harlequin opal surrounded by diamonds. The chain is adorned with oval motifs set with diamonds. Total opal weight: 30.76 carats. Approximately 408 brilliant-cut diamonds, each approximately 0.005 carats, for a total weight of 2.04 carats. Dimensions of the main opal-set motif: 3.15 cm x 3.34 cm. Dimensions of the motifs on the chain: 1.12 cm x 0.70 cm. Flexible link. Chain length: 43.00 cm. Chain width: 0.15 cm. Adjustable to three different lengths with end rings at 41.00 cm and 39.00 cm. Total weight: 18.51 g. Owl hallmark. Excellent condition