The pieces she's likely to be wearing are quite personal to her.
Lisa Levinson, who serves as head of communications for the Natural Diamond Council, believes that the Queen will only wear her "simple Welsh gold wedding band and a pair of pearl earrings," according to Metro.

Calling the Queen "humble," Lisa said she thinks Elizabeth would have wanted it this way to preserve her famed 300-piece collection of jewelry.
Lisa also has some theories about who stands to inherit the rest of Elizabeth's collection.
When Prince Philip proposed to the Queen, he had an engagement ring created with diamonds from a tiara belonging to his mother, Princess Alice of Battenberg. Lisa suspects that this family heirloom will likely go to the couple's only daughter, Princess Anne.

We imagine that will mean a lot to Anne, who has lost both her parents in the span of just 17 months.
The rest of the collection will go on display or be loaned out to other royals.
As for the remaining royal jewels, Lisa thinks those will stay within the family's possession because the Queen "has always been about the legacy of the royal family, in the UK and the Commonwealth," she said, adding that the royal jewels are "very much part of that legacy."
And what an expansive collection of jewelry it is!
The Queen's private collection is made up of an estimated 98 brooches, 34 pairs of earrings, and 15 rings, according to the Daily Mail. When not in use, they are kept in the Queen's Gallery at Buckingham Palace.

The famous Crown Jewels, meanwhile, are kept at the Tower of London. Believe it or not, that collection tops the Queen's private stash and contains an estimated 23,000 diamonds, sapphires, and rubies.

The Queen will be buried on September 19.
The UK (and arguably most of the rest of the world) is in mourning after the monarch's September 8 death. King Charles, Prince William, Prince Harry, and all of their wives have been taking part in several memorial events since the Queen's death.

Elizabeth's final service is expected to be held on September 19 after an extensive period of lying-in-state at Westminster Hall.