Camilla is said to have gifted the item of jewellery to Kate for her 2011 wedding to Prince William. However, the bracelet has not been seen in a public engagement since that year, analysts say.
The bracelet features a thick gold chain as well as a disc on which two ‘C’ letters are engraved.
One ‘C’ is thought to stand for ‘Catherine’ while the other stands for ‘Camilla’.
Kate can be seen wearing the item in public in 2011, including when she made an appearance at Wimbledon.
However, according to Hello! magazine, the Duchess not been pictured with it in public since that year.
In any case, the bracelet is not the only notable item of jewellery Kate owns.
Her engagement ring, offered to her by Prince William, used to belong to the Duke’s late mother Princess Diana, and was itself given to William by Prince Harry.
READ: Kate Middleton’s £349 earrings as she thanks fans for birthday wishes – where to buy
On a visit to the National Portrait Gallery in London ahead of the Olympics in 2012, Kate wore a Cartier necklace which featured an 18-carat chain, Tatler reports.
Last weekend the Duchess celebrated her 39th birthday, which she reportedly celebrated at her home in Norfolk with husband Prince William and their three children.
The Duchess received a number of well-wishes from friends and family.
The Duke and Duchess’ KensingtonRoyal Instagram account responded with a message of thanks in addition to a photo of Kate smiling and waving.
The caption read: “Thank you for your kind wishes on the Duchess’ birthday.
“Birthdays have been very different in recent months, and our thoughts continue to be with all those working on the front line at this hugely challenging time.”
Indeed, the Duchess’ birthday came this year with England in its third national lockdown due to the coronavirus pandemic.
As well as affecting the Duchess’ birthday, social distancing guidelines also preventing the royals from carrying out their usual Christmas celebrations.