Diamond solitaire engagement ring, French, circa 1950.
Diamond solitaire engagement ring. Set centrally with one round old cut diamond in an open back raised claw illusion setting with an approximate weight of 0.65 carats, to a finely pierced undulating collet with circular backholing and trumpeting sloped shoulders, leading through to a ribbed D-shape shank. Marked platinum, French, circa 1950.