The Collaborative International Dictionary of English v.0.48:

Amorphism \A*mor"phism\, n. [See Amorphous.]
   A state of being amorphous; esp. a state of being without
   crystallization even in the minutest particles, as in glass,
   opal, etc.

   Note: There are stony substances which, when fused, may cool
         as glass or as stone; the glass state is spoken of as a
         state of amorphism.
         [1913 Webster]