The duchess doesn't normally wear that much jewelry, but earlier this year, the queen reportedly asked that Kate be given more access to the royal jewels to give her a "princess-y" makeover. Enter the Nizam of Hyderabad necklace, which Kate wore during a visit to the National Portrait Gallery (where she serves as a patron) in February. The necklace was given to the queen by (who else?) the Nizam of Hyderabad, as a wedding present. He told the queen to pick out anything that she wanted from Cartier, and she selected this glittering number, which features a chain of 38 diamonds plus a center piece of 13 emerald-cut diamonds.