Diamond and platinum brooch the openwork plaque of rectangular geometric form, millegrain-set to the centre with a brilliant-cut marquise-shaped diamond weighing approximately 1.04 carat, flanked by six graduated baguette-cut diamonds and two round brilliant-cut diamonds weighing approximately 1.07 carats, to a frame pavé-set with single-cut diamonds weighing approximately 1.72 carats, width approximately 45mm