A late-nineteenth-century sapphire and diamond brooch in the form of a fleur-de-lys, symbol of France. (Sotheby’s)

A late-nineteenth-century sapphire and diamond brooch in the form of a fleur-de-lys, symbol of France. (Sotheby's)

A late-nineteenth-century sapphire and diamond brooch in the form of a fleur-de-lys, symbol of France. (Sotheby’s)