A multi gem-set jewel, second quarter of the 19th centuryThe large oval-cut aquamarine within a collet of wirework, bead and burr motifs, to a highly elaborate tricoloured textured gold frame with floral garland, acanthus leaf and shell decoration, further set with oval-cut orange pastes, old brilliant-cut diamonds and a circular-cut chrysoberyl, suspending three cartouche pendants, mounted as a brooch, probably converted from a larger jewel, diameter 7.3cm, fitted case