French Art deco ring circa 1935, Glannes R. former Maison Duran, natural sapphire (4 carats, laboratory certificate) and diamonds

History: Glannes R. former Maison Duran (maker’s mark: the initials R. G.) Source: Azur Directory of 1937
Period: Around 1935
Metal: Platinum 950/1000 (French hallmark)
Total weight (gross): 6.90 grams
Ring size: 57.5 (can be sized)
Dimensions of the ring head: 1.9 cm x 1.4 cm
Nature of the stones: Natural sapphire of approximately 4 carats (Carat Gem Lab laboratory certificate indicating the absence of thermal modification, an intense blue color and a source of Sri Lanka formerly Ceylon), old cut diamonds (approximately 1.5 carat)
State of conservation: Very good state of conservation
Reference: 30 091 2