A platinum clip brooch in the shape of a semi-circle, with in the middle a large round facetted amethyst (app. 12.5 carats) bordered by 22 round old-cut diamonds, around which is a fanning pattern consisting of 15 baguette-cut amethysts (total app. 30 carats) with 14 round old-cut diamonds in between them in bezel setting (total app. 1 carat); signed and numbered Cartier London. England, circa 1930.

dimensions: 3 x 4 cm
weight: 22.15 grams