Princess Diana kept this set of jewellery for special occasions and wore it first in 1981 to the National Film Institute Dinner at the Royal Festival Hall.
The expert added: “Diana herself refashioned this jewellery and wore some of the sapphires from the suite as a headband to a dinner hosted by Emperor Hirohito in Japan in 1986.
“In fact, it has become one of her many infamous fashion statement moments.”
The earrings are now one of Kate’s favourite pairs in her collection, and she also wears them on special occasions.
Princess Diana used to wear the set on special occasion (Image: Getty)