Please choose the one you like best, this crucible has more than one meaning.
1.A vessel made of a refractory substance such as graphite or porcelain, used for melting and calcining materials at high temperatures. 
2.A severe test, as of patience or belief; a trial. See Synonyms at trial. 
3.A place, time, or situation characterized by the confluence of powerful intellectual, social, economic, or political forces: "Macroeconomics . . . was cast in the crucible of the Depression" (Peter Passell). 
Last edited by BranShea; 08/07/2010 6:37 PM.