A 19th century diamond necklace. Estimate £40,000 - 60,000 (€55,000 - 82,000).  Photo: Bonhams.

The graduating chain of 44 collet-set old brilliant-cut and cushion-shaped diamonds suspending at the front a fringe of pear-shaped diamond drops, the largest to the centre, connected by swags of old brilliant and rose-cut diamonds, mounted in silver and gold, diamonds approximately 49.15 carats total, three paste replacements, length 38.0cm, cased by Mrs Newman, Goldsmith & Court Jeweler, 10 Savile Row, W.

Bonhams. FINE JEWELLERY, 24 Sep 2015 12:00 BST - LONDON, NEW BOND STREET