J.E Caldwell & Co. An impressive fancy vivid yellow diamond and diamond ring, of bombe form, centring a claw-set modified square brilliant-cut fancy vivid yellow diamond weighing 3.57 carats bordered by halo of near colourless old-cut diamonds further framed by an openwork lattice pattern millegrain-set with diamonds, the small diamonds together weighing approximately 1.54 carats, mounted in platinum, size I, signed Jec.Co for J.E Caldwell & Co., accompanied by a GIA report numbered 2135888868, dated 9 November 2011, stating that the 3.57 carat diamond is natural, fancy vivid yellow colour, SI1 clarity.