A sapphire and diamond ring, by Piranesi. Photo courtesy Bonhams.

Set with a sugarloaf sapphire, weighing 24.60 carats, flanked to each side by shield-shaped diamonds, diamonds approximately 1.10 carats total, ring size 6½. Estimate: HK$ 1 million - 1.5 million (€93,000 - 140,000) ($130,000 – $190,000)

Accompanied by a Gübelin Gem Lab report stating that the natural sapphire has no indications of heat treatment and originates from Burma (Myanmar). Report number 12105147, dated 5 November 2012.

Accompanied by an AGL report stating that the natural sapphire has no indications of heat treatment and originates from Burma (Myanmar). Report number CS 38836, dated 21 March 2007. 

Bonhams. FINE JEWELLERY & JADEITE. Hong Kong. 23 Nov 2013 14:00 CST - http://www.bonhams.com