A topaz, natural pearl and diamond necklace, late 19th century, set with an oval topaz, within a

A topaz, natural pearl and diamond necklace, late 19th century, set with an oval topaz, within a foliate gold mount set with rose-cut diamonds and suspending a natural pearl, to a later chain necklace, pendant length 4.9cm, necklace 62cm

Accompanied by LFG report no.406810, stating that the topaz measuring 21.1 x 14.8 x 9.5mm is natural, with no indications of treatment, and the pearl measuring 7.5 - 7.9 x 6.1mm is natural, saltwater