Made from cultured pearls gifted to Elizabeth by the Japanese government and designed by Garrard according to The Court Jeweller, Her Majesty has worn the four-row pearl choker on a variety of high-profile occasions, including a state visit to Bangladesh in 1983 and Margaret Thatcher’s 70th birthday party in 1995.
Most famously, Queen Elizabeth loaned the necklace to a young Princess Diana, whose personal style apparently inspired the necklace's design. Worn just a year after her marriage to Prince Charles, Diana opted to sport the stunning jewels when meeting Queen Beatrix of the Netherlands at Hampton Court Palace in 1982, along with Queen Mary's Lover's Knot Tiara.
As per Harper's BAZAAR U.S., this wasn't the first time that Kate had worn the heirloom, having sported the choker at Queen Elizabeth and Prince Philip's 70th wedding anniversary in 2017.
To match the necklace, Kate wore dangling pearl earrings, which also paid a subtle tribute to her husband's grandparents' love story as they were a wedding gift to the Queen from Hakim of Bahrain in 1947, as per The Court Jeweller.
However, the choker is hardly Kate's first nod to Princess Diana through her jewellery. In fact, Kate inherited several of the late Princess of Wales' pieces, including the Cambridge Lover's Knot Tiara, which was loaned to Diana from the Queen's collection and was a favourite of hers. The Duchess of Cambridge wore the tiara in 2015, marking the first time that it had been worse since Diana's tragic passing.
And of course, her engagement ring is the most significant of Diana's jewellery that now belongs to Kate. Fans of The Crown may have noticed that in its fourth season it delved into the history of the famous sapphire ring, however embellished it may be.
For the funeral, Kate rode alone to St. George's Chapel at Windsor Castle, as Prince William had to walk in the procession. However, she did accompany her husband and brother-in-law, Prince Harry, after the service as they left the church.
"My grandfather was an extraordinary man and part of an extraordinary generation," Prince William wrote of his grandfather last week. "Catherine and I will continue to do what he would have wanted and will support The Queen in the years ahead. I will miss my Grandpa, but I know he would want us to get on with the job."