Antique French 2.55 Ct Diamond Platinum Engagement Ring

France, circa 1915 This early Art Deco ring is finely modeled in platinum. It features a chunky old mine cut diamond set in a bezel and flanked by openwork shoulders encrusted with small old cut diamonds. The principal diamond measures 8.5 x 8 x 5.4 mm and is approximately 2.55 carats. Estimated total diamond weight is 2.85 carats. Marked with dog’s head French assay mark for platinum. The ring is accompanied by the PGS diamond report 49080119. Ring size 7 (17 mm) resizable