18ct gold and diamond 'Hexagonal' ring, Canturi, the square modified brilliant-cut diamond weighing 0.72 carats is half collet-set between white gold batons, size I, signed Canturi. Accompanied by GIA diamond dossier numbered 15559211, dated 14 March 2007, stating that the 0.72 carat diamond is E colour, VS1 clarity, laser inscribed