The 4.25-carat Kahn Canary was worn by first lady Hillary Clinton at her husband’s Presidential Inaugural galas in 1993 and 1997 as a special way to represent Arkansas’s diamond site. The diamond’s owner, Stan Kahn of Pine Bluff, Arkansas, loaned the diamond to Mrs. Clinton. (???)
http://www.craterofdiamondsstatepark.com/history/famous-finds.aspx
So now it's 'cursed', like the Hope Diamond. ;-)