Lot 307. Collection of H.S.H. Gabriela Princess zu Leiningen. A ruby, emerald and diamond flower brooch, by Robert Pouget. Estimate CHF40,000 – CHF60,000 ($41,433 - $62,149). Photo Christie's Image Ltd 2016.  

The rose flowerhead and rosebud set with calibré-cut rubies, to the similarly-set emerald leaves and baguette-cut diamond stem, 8.5 cm, with French assay marks for platinum and gold. Signed Robert Pouget, no. D.668.955

Provenance: H.H. Begum Sultan Mohamed Shah Aga Khan III

 Grace Kelly, Princess of Monaco, with Begum Sultan Mohamed Shah Aga Khan III (wearing lot 307), attend a gala dinner in Monaco © James Andanson/Sygma/Corbis

Christie's. GENEVA MAGNIFICENT JEWELS, 18 May 2016, Geneva