A late 19th century diamond necklace and a diamond and pearl brooch

A late 19th century diamond necklace and a diamond and pearl brooch
The necklace set to the front with a cartouche of scrolling foliate design set with old brilliant and rose-cut diamonds, between similarly-set scrolling links, to a detachable backchain; central cartouche detachable, 41.5cm long; the brooch composed of old-cut diamond-set flowerheads in foliate openwork surrounds suspending a pearl drop from a diamond and ruby-set serpent head surmount, pearl not tested for natural origin, 5.2cm wide (2)