The four-strand piece of "layered strings of cultured pearls" was originally given to Elizabeth from Japan in the 1970s. She wore it to many occasions, including Margaret Thatcher's 70th birthday in 1995. It was loaned to Diana, Princess of Wales, for one of her first engagements as a royal, as well as a 1982 banquet at Hampton Court Palace and a trip to the Netherlands in the same year. Later, the piece was loaned to the Duchess of Cambridge, who has worn it to the anniversary of the Queen and Prince Philip's wedding in 2017 as well as Philip's funeral in 2021.