Sapphire and diamond coronet cluster ring. Centrally set with an oval old cut natural unenhanced sapphire in an open back grain setting with an approximate weight of 3.50 carats, bordered by two rows of fifty round old cut diamonds in open back grain settings with a combined weight of 1.00 carats, further set to with ten round rose cut diamonds in open back rubover settings with a combined weight of 0.10 carats, and set to the centre with a marquise shaped old cut diamond in an open back rubover setting with a weight of 0.10 carats. The total approximate diamond weight is 1.20 carats, to an oval double cluster design with millegrain decoration, a finely pierced scrolling gallery and fancy shaped backholing leading to openwork floral shoulders and terminating in a ridged D-shape shank. Marked platinum, French, circa 1915.
