Crystallization: Colloidal suspense
  According to classical nucleation theory, a crystal grows from a small nucleus that already bears the symmetry of its end phase - but experiments with colloids now reveal that, from an amorphous precursor, crystallites with different structures can develop. 
L\'aszl\'o Gr\'an\'asy, Gyula I. T\'oth
cond-mat.mtrl-sci cond-mat.soft