One particular band was worn by Kate many years before she wed her husband.
The piece was thought to be a gift from Prince William with “romantic” symbolism, CEO of LeVian Eddie Levian explained.
“This beautiful, delicate ring is understated in style, but the very personal message hidden within it from a future King makes it an enormously romantic royal jewel,” he told Express.co.uk.
“William gifted Kate this Victorian rose gold band encrusted with pearls and garnets, while they were still at St Andrews University where they met as students.”
The Duchess of Cambridge chose to wear the ring at her graduation in 2005.
“It’s no surprise Kate was seen wearing it at her graduation,” the expert continued.
“It is a milestone marking her own achievements but also a day which put her on the threshold of a new chapter in her life together with William beyond university.”
Not only is the simple band stunning to look at, Eddie commented on the symbolism.
“Garnets are the birthstone for January, when Kate was born, and were named by the ancient Greeks for their colour resembling pomegranate seeds.
“Garnets signify protection and are thought to promote confidence and mental clarity.
“Even though Kate graduated in 2005, and the couple married much later in 2011, this ring goes to prove that William was smitten with Kate even in those early days.”
Just a few years later, Prince William proposed to Kate with the sapphire and diamond engagement ring which once belonged to Princess Diana.
The royal line of succession – who outranks who?
The line of succession to the British throne dictates the order in which each member of the Royal Family would ascend to the throne.
It is also seen as a ranking of importance with the head of the line, the Queen, taking the place of ruler.
Older children come before younger children. Traditionally boys came before girls, but this law was changed on March 26, 2015 before the birth of Prince William’s first child.
Incredibly, Catholics are still excluded from the line of succession, as are children born outside of wedlock.
The royals, who usually stick to a strict protocol when appearing in public, often arrive at events in ascending order of importance, with the most important royal arriving last.
Prince Charles, 72, is currently first-in-line to the British throne, followed by Prince William, 39, his oldest son.
Then comes Prince William’s children, George, seven, Charlotte, six, and Louis, three, and they are followed by Prince Harry, 36. Prince Harry is succeeded by his son Archie Harrison, born in May 2019.