LONDON — A turquoise and diamond Cartier tiara belonging to Nancy Astor, the American-born British aristocrat and first woman to take up a seat in Parliament, will be auctioned by Bonhams on June 5.

The Princess' paternal grandmother Queen Margrethe II, who abdicated last year, gifted her oldest granddaughter a turquoise and diamond tiara ... you for the birthday song, a whole book of ...