Dome ring in platinum (850), set with a rectangular cut sapphire of fine color in a closed pearl setting on a finely openwork geometrical motif paved with old-cut diamonds. The inside of the ring bears an inscription dated 1931. Art Deco period. (trace of cutting, very slight accident on the setting). Sapphire weight: approx. 5.50 carats. (chips) Jewel accompanied by a GEM Paris gemological examination certificate n° 20241977726, attesting to the sapphire's origin (Sri Lanka, formerly Ceylon), unheated. Gross weight: 7.1 g. Finger circumference: 52. Small chips.