Kate Middleton is officially back to work. The Princess of Wales has made a major public return to royal duties in her first state visit since announcing her cancer diagnosis. Kate and husband Prince William welcomed Qatar’s emir Sheikh Tamim bin Hamad al-Thani and his wife Sheikha Jawaher to the UK on Dec.

Queen Elizabeth and Princess Kate aren’t the only British Royals who had a penchant for these jewels, however. In 1982, the Queen loaned both the choker and earrings to Princess Diana for a State Visit at Buckingham Palace. Kate also paid homage to Diana on Tuesday by wearing her sapphire ring which was a gift from William upon their engagement.