We know the State Visit will include a tiara-tastic dinner at Buckingham Palace, and Maxima got lots of people very excited indeed when she wore a tiara not seen for four decades earlier this year. The Stuart Tiara is a wall of diamonds that comes with lots of matching sparkle, including that bow brooch, and when Maxima wore it to a State Dinner in Luxembourg in May this year, it became a hot favourite for a London appearance too.