A 5.58 carats Kashmir sapphire and diamond ring. Estimate £30,000 - 50,000 (€41,000 - 68,000).  Photo: Bonhams.

The cushion-shaped sapphire, weighing 5.58 carats, horizontally-set within a stylised mount pavé-set with brilliant and baguette-cut diamonds, ring size I

Accompanied by a report from SSEF stating that the sapphire is of Kashmir origin, with no indications of heating. Report number 81059, dated 2 July 2015.

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