Antique Blue Enamel and Diamond Brooch

Antique blue enamel and diamond brooch. Flower motif, set with rose-cut diamond set branches, on a blue guilloche enamel background with a border of rose-cut diamonds.

The back is engraved with a ribbon and a jardiniere.

Mounted in silver and gold, circa 1900.

French eagle mark, for 18ct gold.

Maker’s mark, with RC in a lozenge, with a star above and a square below.

Risler & Carré, Paris, 1897 to 1912.