What is the formation of Crystals?

Answer 1

the making of a solid from a fluid. which includes the segrigation of elements and minerals which bond in a specific way to form crystals.
crystals require an initial nucleus to which the "chemicals" attach, and once it starts forming the crystal grows until hindered by composition or space

Answer 2

the arrangement of atoms or molecules into a rigid, geometric, and repeating structure. e.g. ice crystals