RUBY AND DIAMOND NECKLACE. White gold 750. Decorative, elegant Rivière necklace, the centre set with 5 oval rubies weighing ca. 10.50 ct, untreated, and 4 rosette motifs set with diamonds. Total weight of the brilliant-cut diamonds ca. 7.50 ct. L ca. 40 cm. 1 ruby with GRS Report No. GRS2013-101698, November 2013, and 4 TIGL Reports.