The Nizam of Hyderabad Necklace For a black-tie gala at the National Portrait Gallery in 2014, Kate selected some serious royal bling. The Nizam of Hyderabad necklace was gifted to the queen for her wedding — featuring 38 brilliant diamonds plus 13 emerald-cut diamonds and a pear-shaped drop, it has been worn by the queen for several official portraits. Image Source: Getty / Max Mumby/Indigo