Queen Mary’s carved emerald from the Maharanis of India| England Royal Jewels
Queen Camilla’s earrings are not the Diamond Navette Flower Earrings from the late Queen Mother. We see small pavee setting in the closeup.
Elizabeth the Queen Mother’s Diamond Navette Flower Earrings are first seen in public on her in 1948, on the occasion of Pamela Mountbatten’s wedding.
The Diamond Earrings are one of the favorite jewels of Elizabeth, the Queen Mother.
Not sure but probably also from the Greville legacy.