A late 19th century sapphire and diamond brooch, set with a cushion-shaped sapphire measuring

A late 19th century sapphire and diamond brooch, set with a cushion-shaped sapphire measuring approximately 10.4 x 9.1 x 5.3mm, within a scrolling surround set with old cushion-shaped diamonds in silver and gold, suspending an articulated drop set with a pear-shaped sapphire within a diamond-set scroll surround, width 3.4cm

A verbal report from GCS states that the cushion-shaped sapphire is of Sri Lankan (Ceylon) origin, with no indications of heat treatment