I found a list of fictional materials on wikipedia. It includes some from warcraft as well as others from other fantasy games, books, movies, etc.
http://en.wikipedia.org/wiki/List_of_fictional_elements,_materials,_isotopes_and_atomic_particles
And here are the super crazy amazing super materials
http://en.wikipedia.org/wiki/List_of_fictional_super_metals
The more of them you recognize, the bigger geek you are :D