This beautiful vintage brooch, circa 1940's, is unmarked as to the maker. It has to be one of the great jewelry companies of the era such as De Rosa, Pennino, Boucher, Mazer, etc.
Heavy three-piece construction that creates a layered 3-dimensional floral-like formation of elegance. A circle of large dark blue sapphire, prong-set, open-back, foiled rhinestones has an inter-ring and outer points set with smaller diamond sets. From the circle extends plain and diamond studded ribbons. The base piece consists of leaf-like appendages as well as an arched ribbon set with small diamond sets. I cannot find a "Sterling" mark, but because of the layers construction it could be easily hidden from sight. The brooch, which as a safety clasp, measures 2" in width and 2 1/2" in length. There is no damage or missing stones; the vermeil finish shows very little if any wear; some of the tiny diamond rhinestones have dulled somewhat.