A diamond bracelet, by Bvlgari. Photo Christie's Image Ltd 2014

The tapered sprung bangle set with a central marquise-cut diamond weighing approximately 18.27 carats, to a fluted pavé-set brilliant and baguette-cut diamond surround with pierced geometric detailing, internal circumference 15.0cm, maker's case. Signed Bulgari, no.C2840. Estimate £150,000 – £180,000 ($251,100 - $301,320)

Accompanied by report no.5161142641 dated 14 May 2014 from The Gemmological Institute of America (GIA), stating the 18.27 carat diamond is Fancy Brown-Yellow, VVS1 Clarity, no fluorescence

Christie's. IMPORTANT JEWELS, 4 June 2014, London, King Street -http://www.christies.com/