How Princess Diana's engagement ring broke royal tradition Later becoming one of the most influential jewellery designs in modern history, the "controversial" story behind Princess Diana's engagement ring has been revealed. 20 April 2026 The "controversial" story behind Princess Diana's engagement ring has been revealed. The 'controversial' story behind Princess Diana's engagement ring has been revealed Now one of the most recognisable pieces of jewellery in the world, it's been revealed in report by People her band was once considered a major break from royal convention.