A French diamond-set brooch, circa 1950s-1960s, of articulated wired openwork cones, borders accentuated with lines of brilliant-cut diamonds, double pin brooch fittings to verso, convertible to a pendant with hinged bails, eagle head hallmarks on stems indicating 18ct, dog heads on mount indicating platinum, also stamped with maker's mark for Henri Deperroies, overall measures 4.6 x 2.5 cm, total weight of item 19.8 grams.