A sapphire and diamond cluster ring, by Tiffany & Co. Photo courtesy Bonhams

The cushion-cut sapphire, weighing 4.46 carats, surrounded by old brilliant-cut diamonds, diamonds approximately 1.55 carats total, signed Tiffany & Co., ring size 6¼. Estimate HK$ 1.05 million - 1.3 million (€100,000 - 120,000)

Accompanied by a SSEF Swiss Gemmological Institute report stating that the natural sapphire has no indications of heat treatment and originates from Kashmir. Report number 59208, date 30 March 2011.

Accompanied by a AGL American Gemmological Laboratories report stating that the natural sapphire has no indications of heat treatment and originates from Kashmir. Report number CS 51407, dated 28 August 2012. 

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