A sapphire and diamond ring. Photo Bonhams.

The oval-cut sapphire, weighing 25.30 carats, within a ballerina setting of tapered baguette-cut diamonds, highlighted with pear and marquise-cut diamonds, diamonds approximately 3.95 carats total, ring size 5½, cased. Estimate HK$ 160,000 - 240,000 (€15,000 - 22,000)

Accompanied by a GIA report stating that the natural sapphire has indications of heat treatment. Report number 2154447600, dated 16 July 2013.

Bonhams. FINE JEWELLERY AND JADEITE. Hong Kong, Admiralty, 21 May 2014 - http://www.bonhams.com/