A Victorian diamond and ruby heart-locket pendant

A Victorian diamond and ruby heart-locket pendant, to the centre a cushion-cut ruby estimated to weigh 0.45 carats, to an old European-cut diamond pave-set surround, suspended by a diamond-set loop, the diamonds estimated to weigh 7.5 carats in total, all mounted in silver and yellow gold, to the back with glass locket compartment, circa 1880, measuring approximately 3.1 x 2.5 cm, gross weight 10.6 grams,