A fancy coloured diamond and diamond dress ring. Photo courtesy Bonhams

The fancy intense blue diamond, weighing 0.73 carat, highlighted with brilliant-cut diamonds of pink tint, all within a surround of heart-shaped diamonds, the shoulders set with brilliant-cut diamond detail,diamonds approximately 4.70 carats total, pink diamonds untested for natural colour, ring size 5½. Estimate HK$ 1.1 million - 1.5 million (€110,000 - 140,000)

Accompanied by a GIA report stating that the diamond is natural, fancy intense blue colour and of VVS2 clarity. Report number 2145721229, dated 25 June 2012. 

Bonhams. FINE JEWELLERY & JADEITE. Hong Kong.23 Nov 2013