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

The step-cut sapphire, weighing 8.37 carats, between pavé-set brilliant-cut diamonds shoulders, diamonds approximately 1.50 carats total, signed Hatik, ring size 7. Estimate HK$ 560,000 - 760,000 (€54,000 - 73,000)

Accompanied by a Gübelin Gemlab report stating that the natural sapphire has no indications of heat treatment, and originates from Ceylon(Sri Lanka). Report number 9906247, dated 29 June 1999.

Accompanied by a GRS report stating that the natural sapphire has no indication of heat treatment and originates from Sri Lanka. Report number GRS2013-098181, dated 10 September 2013

Bonhams. FINE JEWELLERY & JADEITE. Hong Kong. 23 Nov 2013 14:00 CST