Amorphous:

Amorphous materials have no regular arrangement of their molecules. Materials such as paraffin and glass are considered amorphous. Their materials have the properties of solids. That has definite shape and volume and diffuses slowly. Those materials also lack sharply defined melting points.  In several respects, they resemble liquids which flow extremely slowly at room temperature.

Crystalline:

Within a crystalline structure, the atoms are arranged in a 3-dimensional array known as a lattice. The lattice has a regular repeating configuration in all directions. A group of particles from one categories of a crystal has accurately the similar geometric relationship as a group from any other category of the similar crystal.