| Property | Crystalline solids | Amorphous solids |
| 1. | Shape | They have definite characteristic geometrical shape due to the orderly regular long range arrangement of constituent particles. | They have irregular shape and lack characteristic geometrical shape due to the short range orderly arrangement of constituent particles. |
| 2. | Melting point | They have sharp and characteristic melting point. | They do not have sharp melting point. They gradually soften over a range of temperature. |
| 3. | Cleavage propert | When cut with a sharp edged tool, they split into two pieces and the newly generated surfaces are plain and smooth. | When cut with a sharp edged tool, they cut into two pieces with irregular surfaces. |
| 4. | Heat of fusion | They have a definite and characteristic heat of fusion. | They do not have definite heat of fusion. |
| 5. | Anisotropy | They are anisotropic, i.e., have different physical properties in different direction | They are isotropic, i.e., have same physical properties in all directions. |
| 6. | Nature | They are true solids | They are pseudo solids or super cooled liquids. |
| 7. | Order in arrangement of constituent particles | They have long range order. | They have only short range order |
| eg. | | Copper, silver, iron, zinc sulphide, common salt, potassium nitrate, etc | Glass, rubber, plastics, etc |