An incredible three dimensional navette ring, created in Paris France by the jewelry house of Boucheron during the mid-century period, back in the 1960. This sculptural flamboyant cocktail ring has been crafted with impeccable details in solid yellow gold of 18 karats with high polished finish. Designed with a very unusual three dimensional navette shape with a raised element in the center. Diamonds: Mounted in a double row of stepped prongs settings, with 58 calibrated round brilliant cut diamonds, 3.48 carats, white colorless F color, VS-1 clarity. Gemstones: Mount in the center with 1 special fancy cabochon cut (22 x 9 x 14 mm) of natural blue lapis lazuli of 9.5 carats. Weight: 11.2 Grams, (7.17 Dwt). Size: 6.25 sizeable. Measurements: 33 mm by 15 mm (1.31 x 0.59 Inches) and raise 20 mm over the finger. Hallmarks: Stamped with French marks, the head of the eagle for the assay and guaranty of the gold, the maker's mark inside a lozange cartouche, the serial numbers and signed, "BOUCHERON PARIS 4426". Very good conditions. Upon Request, Auction House may provide an appraisal. This will carry an additional cost. Appraisals are made by our in house GIA certified Gemologist.