A ruby and diamond ring. Photo Bonhams

Set with an oval-cut ruby, weighing 3.81 carats, flanked on each side with an oval-cut and a tapered baguette-cut diamond, mounted in 18k yellow gold and platinum, the diamonds estimated to weigh approximately 1.70 carats in total, ring size 6½. Lot 715. Estimate: HK$ 1.6 million - 2.1 million / US$ 210,000 - 270,000 / £130,000 - 170,000. Unsold

Accompanied by a certificate from Gübelin, stating that the 3.81 carats ruby is natural red colour, has no indications of heating and originates from Burma. Report number 1005657, dated 17 May 2010

Accompanied by a certificate from AGL, stating that the 3.81 carats ruby is natural red colour, has no indications of heating, no clarity enhancement and originates from Burma. Report number CS 41682, dated 27 Jan 2010

3.81克拉無加熱緬甸紅寶 鑽石 戒指

Bonhams. 26 May 2012 2 p.m. Hong Kong. Fine Jewellery & Jadeite