An emerald and diamond brooch. Photo Christie's Image Ltd 2013

Centering upon a cut-cornered rectangular-cut emerald, weighing approximately 62.40 carats, within a baguette-cut diamond surround to the marquise-shaped and brillant-cut diamond terminals, mounted in platinum and gold, 5.5 cm. Estimate:  $522,402 – $633,551

Accompanied by report no. 69258 dated 26 August 2013 from the SSEF Swiss Gemological Institute stating that the emerald is of Colombian origin, with indications of moderate amount of oil and an Appendix letter stating that the emerald ‘exhibits an impressive size and weight, combined with an attractive and well-saturated green colour and fine purity.’

Christies. MAGNIFICENT JEWELS. 12 November 2013. Geneva.