Per the royal family, the turquoise tiara hails from "the late 19th century" and originally was owned by the Swedish royal family until Crown Princess Margareta of Sweden died in 1920.

A Cartier turquoise and diamond tiara owned by the first woman to take a seat in the House of Commons has been sold for £889,400. American-born Nancy Astor was elected in 1919 to represent ...

Auctioneers said they were left stunned as a dazzling Cartier tiara, once owned by former Plymouth MP Nancy Astor, soared far beyond its estimated value at auction. The diamond-encrusted tiara ...