The Hope is a diamond that's believed to be cursed, despite its positive moniker. Exhibit A: Evalyn Walsh McLean, one of its former owners, referred to the rock as her "lucky charm." Soon after acquiring it, though, McLean's son died in a car accident, her husband divorced her and died insane, and her daughter committed suicide. She herself became a moprhine addict. In 1959, the 45.52-carat rock was donated to the Smithsonian in 1958. It was sent by regular mail.