A mid 20th century 31.45 carats Sri Lankan sapphire and diamond ring. Estimate £40,000 - 60,000 (€55,000 - 82,000).  Photo: Bonhams.

The large sugarloaf cabochon sapphire, weighing 31.45 carats, between stepped shoulders of baguette-cut diamonds,ring size H½

Accompanied by a report from SSEF stating that the sapphire is of Sri Lankan origin, with no indications of heating. Report number 81051, dated 2 July 2015.

Bonhams. FINE JEWELLERY, 24 Sep 2015 12:00 BST - LONDON, NEW BOND STREET