A 17th-18th century diamond-set pendant necklace and earring suite. Photo: Bonhams.

The series of finely pierced pear or navette-shaped cartouches with floral accents, collet-set throughout with table and rose-cut diamonds in closed-back settings, accompanied by a pair of pendent earrings en suite, composite, lengths: necklace 45.0cm, earring 3.0cm, tooled leather case with Papal coat of arms (2). Estimate £4,000 - 6,000 (€4,800 - 7,300)

Bonhams. JEWELLERY. 12 Feb 2014, London, Knightsbridge - www.bonhams.com