A ruby and diamond brooch, 19th century

A ruby and diamond brooch, 19th century, set with an old cushion-cut diamond to the centre weighing approximately 2.40cts, of quatrefoil design set with graduating step-cut rubies within concentric outlines set with old mine-cut diamonds, separated with four diamond-set panels, each with an old mine-cut ruby to the centre, in silver and gold, with a later brooch fitting, width 4.5cm, case