Important and impressive platinum, diamond and natural sapphire cocktail ring, circa 1930s. It features a vibrant blue oval natural Burma sapphire central stone measuring 5.61ct total weight (NO evidence of being heat treated or clarity enhanced). The central stone is surrounded by a ring of high quality brilliant round cut diamonds and an outer ring of nice cabochon sapphires. Ring comes with a certificate from AGL (American Gemological Laboratories) that denotes the specifics of the sapphire central stone, mainly its whereabouts and its lack of enhancement treatments . In very good pre-owned condition. Hallmarks: Cyril (Blank), rest seems unrecognizable.