The Princess of Wales (previously the Duchess of York, later Queen Mary) wears the Boucheron Loop Tiara for a coronation-related portrait, ca. 1902; more on this lost sparkler over here!

The Princess of Wales (later Queen Mary, previously the Duchess of York) wears the Iveagh Tiara in a portrait, ca. 1905; read more about this classic tiara over here!

Sarah, Duchess of York wears her diamond wedding tiara for a banquet given by King Fahd of Saudi Arabia at Claridge’s in London, March 1987; the tiara, a gift from the Queen and Prince Philip, remained Sarah’s personal property after her divorce