In recent years, the necklace has earned recognition as a firm favourite of Kate, Duchess of Cambridge, and she wore it as a “bittersweet” tribute to the late Duke of Edinburgh last year.

Kate paired the necklace with a black coat dress from one of her favoured brands, Catherine Walker, and a black fascinator.

The jewellery expert added: “Given its inspiration, it seems very apt that the Duchess of Cambridge has recently been seen sporting this piece.

“In slightly bittersweet circumstances, Kate wore this necklace at both the Queen and Prince Philip’s wedding anniversary in 2017 and then again at Prince Philip’s funeral in 2021, again highlighting the poignancy of this piece to the royals.”