Fancy deep brownish yellow diamond and diamond ring. Photo Tiancheng International

Centring on a cut-cornered rectangular modified brilliant-cut brown diamond weighing 25.11 carats, to a stylised basket set with brilliant-cut diamonds extending to the split shoulders, the diamonds together weighing approximately 1.40 carats, mounted in 18 karat yellow gold. Ring size: 5 ½  Estimate: HK$3,000,000 - 4,000,000 US$385,000 - 520,000. Sold for HK$3,540,000

Accompanied by GIA report numbered 2125634769, dated 20 August 2013, stating that the 25.11 carat diamond is natural, Fancy Deep Brownish Yellow colour, VS1 clarity.