A late Victorian emerald, ruby and diamond twin heart ring

A late Victorian emerald, ruby and diamond twin heart ring, the ring set with two interlocking hearts, one set with a pear-shaped emerald, the other with a pear-shaped ruby estimated to weigh 0.30 carats each, both claw-set to the centre of an old European-cut diamond cluster, with a diamond-set ribbon bow to the top, all in silver to a yellow gold mount with split shoulders, gross weight 5.2 grams, circa 1870,