Queen Camilla shined from across the room at a state banquet in honor of the Sultan of Oman last week, and it was all thanks to Queen Elizabeth . When she decided to dig into the royal archives, The Queen made sure to commemorate the late monarch with one of the most famous pieces in her royal collection .

Arriving at Windsor Castle alongside King Charles and Sultan Haitham bin Tarik al Said on October 20, Camilla was dressed in an a bright indigo gown. While the piece sparkled with crystals decorating the hemline, all eyes were on the Girls of Britain and Ireland Tiara resting on her head.

The diamond piece, which was created by crown jeweler Garrard & Co in 1893, acted as an homage to Queen Elizabeth.…