An unusual fancy coloured diamond, sapphire and diamond ring, circa 1950. Photo courtesy Bonhams

The square step-cut fancy intense yellow diamond, weighing 2.87 carats, opposing a square step-cut sapphire, set within a striking, angular mount of baguette-cut diamonds, the gallery with engraved detail, remaining diamonds approximately 1.60 carats total, sapphire approximately 3.50 carats, ring size 6½. Estimate HK$ 400,000 - 600,000 (€38,000 - 57,000)

Accompanied by a GIA report stating that the diamond is natural, fancy intense yellow and of VS1 clarity. Report number 2141196536, dated 15 December 2011.

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