A sapphire and diamond ring, by Meister. Photo Christie's Image Ltd 2014

Centering upon an oval-shaped sapphire, weighing approximately 17.34 carats, on a baguette-cut diamond multiple graduated line surround, mounted in gold, ring size 6½. Signed EM for Meister. Estimate CHF20,000 – CHF30,000 ($22,948 - $34,422)

Accompanied by report no. 55746 dated 13 April 2010 from the SSEF Swiss Gemmological Institute stating that the sapphire is of Ceylon origin, with no indications of heating

Christie's. GENEVA MAGNIFICENT JEWELS. 14 May 2014, Geneva -http://www.christies.com/