A mid to late 19th century diamond necklace Set to the front with an old brilliant-cut diamond cluster, issuing a spray of similarly-cut diamonds, between similarly designed graduated scrolls, suspended from a later detachable chain of alternating rose-cut diamond-set navette-shaped links and old brilliant and rose-cut diamond five-stone sections, centre detachable for wear as brooch, brooch fitting provided, composite, old brilliant-cut diamonds approx. 9.10 carats total, brooch width 10.1cm, backchain length 24.7cm, fitted case by Collingwood