Duchess of Devonshire Emerald Tiara by Cartier, c. 1901-1910

Georgiana Cavendish, Duchess of Devonshire (7 June 1757 – 30 March 1806) was an English socialite, style icon, author, and activist. Of noble birth from the House of Spencer, married into the House of Cavendish, she was the first wife of William Cavendish, 5th Duke of Devonshire, and the mother of the 6th Duke of Devonshire. As the Duchess of Devonshire, she garnered much attention and fame in society during her lifetime With a preeminent position in the peerage of England, the duchess was famous for her beauty, charisma, and leading fashion and style; political campaigning; emotionally and psychologically conflicting marital arrangements and love affairs; and socializing and gambling.She was the great-great-great-great-aunt of Diana, Princess of Wales. Their lives, centuries apart, have been compared in tragedy in contemporary time.