A late 19th century blue enamel, half pearl and diamond pendant brooch The rose-cut diamond circlet with a royal blue enamel edge, with a graduated base of seven half-pearls in closed back mounts, to a blue enamel ribbon design surmount, suspended from a blue enamel and engraved ribbon design brooch, with old brilliant-cut diamond centre, composite, some enamel loss, length 6.7cm