A natural pearl and diamond brooch/pendant, third quarter of the 19th century. Photo Bonhams. The natural pearl, measuring 11.3 x 11.8 x 10.5mm, within a cushion-shaped diamond surround, with old brilliant-cut diamond highlights, suspending a detachable...

A natural pearl, ruby and diamond brooch, third quarter of the 19th century. Photo: Bonhams. The openwork cartouche set with a central natural pearl, old brilliant and rose-cut diamonds and cushion-shaped rubies, within a scalloped frame of black enamel...