An antique diamond and natural pearl brooch, circa 1880. Estimate $45,000 – $65,000. Unsold . Photo Christie's Image Ltd 2015

The center designed as an old-cut diamond flower centering upon a button-shaped natural pearl, measuring approximately 10.85-11.21 x 9.83 mm, to the old-cut diamond scrollwork surround, suspending an articulated drop-shaped natural pearl pendant, measuring approximately 10.10-10.90 x 16.40 mm, circa 1880, 3 ins., mounted in silver-topped gold

Accompanied by report no. 81684 dated 20 August 2015 from the SSEF Swiss Gemmological Institute stating that thepearls are natural saltwater

With report no. 1152296685 dated 20 March 2013 from the GIA Gemological Institute of America stating that the button pearl is natural saltwater

With report no. 2165061946 dated 25 April 2014 from the GIA Gemological Institute of America stating that the semi-baroque drop pearl is natural saltwater

Christie's. IMPORTANT JEWELS, 20 October 2015, New York, Rockefeller Plaza