Nancy Astor's Rare Cartier Turquoise and Diamond Tiara | London Jewels, 5 June 2025

Bonhams Global Director of Jewellery, Jean Ghika, explores the remarkable history and craftsmanship behind the Astor turquoise and diamond tiara, a striking piece created by Cartier circa 1930. Once owned by the influential Nancy Astor, Viscountess Astor (1879–1964)—the first woman to take a seat in the British Parliament—this rare tiara is a testament to Cartier’s enduring design legacy.

Of Eastern inspiration and featuring exquisite turquoise and diamond detailing, the tiara is offered for the first time on the market since it was originally sold to Lord Astor by Cartier London in 1930. Now presented with a pre-sale estimate of £250,000–£350,000, it will be a highlight of the upcoming London Jewels auction this June.