Pair of Natural Pearl and Diamond Ear Pendants, by Cartier. Photo Christie's Image Ltd 2014

The two slightly baroque drop-shaped natural pearls of white and grey colour, weighing respectively approximately 112.32 and 96.52 grains, each with a diamond-set cap, suspended from a baguette- and circular-cut diamond fan-shaped top, 1949 (pearls of later addition), 4.4 cm, with French assay marks for platinum and gold, in pink suede fitted case Signed and with maker’s mark for Cartier, no. 01486 – Estimate: CHF270,000 – CHF450,000 ($306,097 – $510,162)

Accompanied by report no. 71772 dated 27 November 2013 from the SSEF Swiss Gemmological Institute stating that both pearls are natural saltwater pearls, with no indications of artificial colour modification, and an Appendix letter stating that 'These pearls of highly attractive size have been selected carefully and set as a perfect combination.'

Report no. 0403053/1 and 2 dated 8 March 2004 from the Gübelin GemLab stating that both pearls are natural saltwater pearls, with no indications of colour enhancement

Certificate of Authenticity no. GE-2004-125 dated 22 November 2004 from Cartier Geneva

Christie's. GENEVA MAGNIFICENT JEWELS.14 May 2014. Geneva