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

Centering upon a cushion-shaped sapphire, weighing approximately 12.22 carats, in a brilliant-cut and marquise-shaped diamond cluster surround, mounted in gold, 4.0 cm. Signed Meister. Estimate CHF25,000 – CHF35,000 ($28,685 - $40,159)

Accompanied by report no. 56270 dated 16 June 2010 from the SSEF Swiss Gemmological Institute stating that the sapphire is a natural sapphire, with no indications of heating

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