An antique diamond necklace, circa 1880. © 2002-2010 Bonhams 1793 Ltd designed as elaborate graduated openwork sections of rose-cut diamonds in a floral motif, completed by a (later) gold backchain; sections can be converted to brooches and earrings with...

A diamond, enamel and pearl Renaissance revival pendant/necklace, circa 1870 The ornate cross pendant with monochrome enamel decoration and scrolled foliate terminals, set with a central cushion-shaped diamond, weighing 3.00 carats, within an old brilliant-cut...