Pendant necklace in yellow gold, diamonds and rubies

18k yellow gold (750/1000) necklace. Set with a cabochon-cut ruby ​​of approximately 0.91 ct, surrounded by 12 brilliant-cut diamonds of approximately 0.06 ct each. 10 diamonds of approximately 0.03 ct each. 68 diamonds set in the links, of approximately 0.01 ct each. Total diamond weight: 1.70 ct. Total number of diamonds: 90. Length: 41.5 cm. Motif width: 1.5 cm. Chain width: 0.5 cm. Thickness: 0.98 cm. Total weight: 45.72 g. Clasp with two figure-eight safety catches. Owl hallmark. Excellent condition.