An Art Deco platinum, onyx and diamond double clip brooch, possibly American, circa 1925. Of geometric design set wtih faceted onyx and baguette and modern round brilliant diamonds, mounted in platinum. In the style of Janesich. Length 4 inches. Bijoux, Art Deco, Art Nouveau, Baguette, Art Deco Jewelry, Antique Jewelry, Vintage Jewelry, Unusual Jewelry, Vintage Jewellery