An opal and diamond bangle, a diamond necklace and a diamond brooch,, circa 1900

An opal and diamond bangle, a diamond necklace and a diamond brooch, circa 1900
1st: The oval cabochon opal to a trifurcated bangle with rose-cut diamond foliate decoration to the front, 2nd: Designed as a continuous series of scrollwork fancy-links set with rose-cut diamonds, 3rd: The openwork plaque of scrollwork design, set throughout with rose-cut diamonds, all mounted in silver and gold, necklace and brooch with Dutch assay marks, bangle inner diameters 5.5cm x 4.9cm, lengths: necklace 38.2cm, brooch 4.6cm (3)