The pearl and diamond earrings belonging to the late Diana, Princess of Wales.
The pearls are called Collingwood Pearl Earrings, the wedding gift from the Collingwoodjewelers favored by the Spencer Family ever since Lady Diana was a girl.
When Catherine, Duchess of Cambridge, turns 40 years on 9th January 2022. She chose this Diamond and Pearl Earrings for the new official picture.
We could see both Ladies in the picture, with the same jewels, the sapphire and diamond ring and the fine pearl earrings. The earrings were one of her favorite jewels, Diana the Princess of Wales wore it very often.