A sapphire and diamond necklace. Photo: Bonhams.

The chain of brilliant-cut diamond annular links, alternating with oval-cut sapphire and brilliant-cut diamond clusters, diamonds approximately 20.40 carats total, length 41.8cm. Estimate £10,000 - 12,000 (€12,000 - 14,000)

Bonhams. FINE JEWELLERY, 30 Apr 2014, London, New Bond Street -www.bonhams.com