The Princess of Wales masters diplomatic dressing in a coat dress by British-Nigerian designer Tolu Coker for first day of the Nigerian state visit

Diana debuted the earrings for dinner in honour of King Khalid of Saudi Arabia at Claridge’s in June 1981, several weeks before her wedding. They quickly became a mainstay in her collection and remained a favourite of Diana’s throughout her marriage; for grand state occasions, the Princess normally paired them with other pearl pieces, such as the Queen Mary Lover’s Knot Tiara – a combination which has also proved popular with Kate Middleton.

Prince William and the Princess of Wales met with…