Collingwood pearl earrings

Princess Diana frequently wore the Collingwood pearl earrings while out at royal events, and Kate has also donned the earrings in recent years.

Ms Michell said: “A wedding gift to Princess Diana, these pearl earrings were given to her a month before her wedding day by Collingwood Jewellers (family jewellers of the Spencer Family), and worn as part of her sending-off outfit.

“She wore them over a dozen times either dressed up or down, and [the earrings] have been worn as many times by Kate to official functions.