A Victorian diamond set pendant/brooch and modern chain

A Victorian diamond set pendant/brooch and modern chain, central claw set old mine cut diamond, estimated approximate weight 0.40ct, surrounded by old mine cut diamonds (one lacking) and suspended from a detachable diamond set bale, estimated approximate total diamond weight 1.25ct, length including bale 5.5cm, width 3.5cm, detachable pin and hook brooch fitting, unmarked, tested as 15ct gold and silver, modern belcher link chain, length 40cm, width 2.6mm, hallmarked London, 9ct gold, gross weight 17.4g