Some eagle-eyed royal watchers are pointing out the history of the queen's choice of accessory for the meeting.
Was Queen Elizabeth II aiming a bold political statement at President Trump with her jewelry?
On the Day Air Force One touched down in the U.K. last week, the queen accessorized with a small green flower brooch, made of 14-karat yellow gold and diamonds. It was a gift from President Barack Obama and his wife, Michelle, when they visited in 2011.
"Some people interpreting the queen wearing that brooch as an act of defiance against President Trump," royal expert Victoria Arbiter told Inside Edition.
When the queen welcomed the president and first lady to Windsor Castle, she wore a diamond palm leaf brooch. It's the same brooch her mother wore at the funeral of King George in 1952.
On the last day of President Trump's visit, the queen wore a sapphire jubilee snowflake brooch, which was a gift from the Canadian people. That's now seen as an interesting choice considering how testy things have been lately between America and its neighbors to the north.
Inside Edition asked Buckingham Palace if was deliberate, but a spokesman said they don't "comment on personal jewelry."
"The queen would never use fashion or jewelry to slight someone, particularly someone that she is hosting or is visiting her house," Arbiter added.
Meghan Markle made a fashion statement of her own Tuesday as she stepped out with hubby Prince Harry in London.
The newlyweds attended an exhibition celebrating the life and career of former South African President Nelson Mandela. The exhibit opened the day before what would have been the late leader's 100th birthday.
The Duchess of Sussex wore a chic, sleeveless trench dress. The dress is not new; she purchased the $825 dress last year before moving to London.
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