THREE DIAMOND-SET OPENWORK BROOCHES, one with two diamond single-stone collets in rose-cut diamond entwined figure-of-eight centre, 3.2cm. wide; one set in diamonds and rose-cut diamonds with a ribbon bow above two gilt flowerheads, with pearl drop, 5.5cm. high, both mounted in silver and gold, both circa 1880, and a diamond and rose-cut diamond ribbon bow brooch