the tremblant wings of openwork design formed of curving lines of rose cut diamonds and similarly bordered, dotted each with three larger diamonds forming the markings, the tapering body with oval cluster and three graduated single stones, a smaller diamond forming the head and antennae with diamond accent lines and serrated edges to imitate the feathery effect, open cut down collet set in silver and gold, the brooch fitting and screw later added adaption (screw stamped 18K and unclear second mark) Wingspan 8.7cm / 3 7/16''
Height 4.5cm / 1�''
Largest diamond to centre approximately 8.0 x 7.6 x 3.0mm Weight: 21g
Late 18th century cushion cut diamond five petal flowerhead brooch, c.1790, centred by a principal slightly hexagonal old cut diamond in border of smaller cushion cuts,
Early 20th century yellow sapphire, sapphire and diamond cluster brooch, c.1910, centred by an 11.90ct Ceylon yellow sapphire of old square cushion cut and lemony-yellow hue,