From proving that she is “a very strong woman” with her specific wardrobe choices to quietly letting her staff know when she needs to be “saved” from uncomfortable social settings, Queen Elizabeth II’s fashion choices are always of interest to royal watchers. This was no different when Her Majesty delivered her 65th Queen’s Speech on Monday, which officially opened Parliament.

Likely to the surprise of many, the Queen, 93, also decided at that time to “break a royal tradition” that Her Majesty has followed since taking the throne in 1952.

According to the Mirror, the monarch decided to forgo wearing her the Imperial State Crown. There have only been two other occasions that she made such a choice, in 1974 when there were two general elections and in 2017 following a snap election.

READ: Queen Elizabeth II’s Secrets To Be Revealed After Giving This Person ‘Extraordinary Permission’

Originally, the piece was created for King George VI’s 1937 coronation. The antique piece, which features 2,868 diamonds in silver mounts, 269 pearls, 17 sapphires, and 11 emeralds, is only seen at coronations and state openings of Parliament. The weight of the piece may account for why the Queen made the choice to swap it out for something a bit lighter during this particular appearance.

Instead, she wore the George IV diadem, which is a smaller and lighter alternative. The last time she wore the head piece was in 1953 on her way to the coronation. Since then, it has been replaced by the Imperial State Crown. 

Jewelry and opulent pieces that the royal family wears have always been a source of intrique for royal watchers, ranging from interest regarding why Meghan Markle stopped wearing her engagement ring on her recent royal tour of Africa with Prince Harry to Queen Elizabeth’s “prized possession” that recently made an apperance in the “Downton Abbey” movie.

Queen Elizabeth Broke This 'Royal Tradition' In A Very Public Way Queen Elizabeth II arrives at Tweedbank Station on Sept. 9, 2015, in Tweedbank, Scotland. photo: Getty images/Chris Jackson