A FINE GEORGE IV VARI-COLOURED GOLD AND AMETHYST SUITE comprising necklace, pair of bracelets, earrings and brooch, the necklace with graduated oval collets in two-coloured gold cannetille settings, with two-stone pendant earrings and shaped oblong brooch en suite, the bracelets with similar clasps and narrow beaded flexible bands, circa 1830, in fitted case