Plate brooch in platinum (850°/oo) with openwork geometric design, entirely set with crown-cut diamonds (slight accidents) and a few old-cut diamonds, centred on a square cut sapphire weighing approximately 2.20 carats (wear). The pin is in platinum (850°/oo) with a later addition (traces of yellow gold soldering). Dimensions: approx. 60 x 23 mm - Gross weight: 12.9 g