There are three general classifications for the states of matter and physical properties of materials. These are described as being solids, liquids, and gasses. Where the differences between each is the seen with the general arrangement of the molecules within the materials. As such, materials are able to change the given state of matter based on the regularity of the molecules within the material. On type of solid state of matter is a crystal formation, where the molecules fit together in a repeating pattern, called a lattice forming a solid rock material. The way that these lattice structures form is through a process known as crystallization and causes the material to form geometric shapes such as triangles, rectangles, and squares. The shapes are a direct result of the type of molecules and atoms that make up the crystal. Where the different molecules found in the crystal will determine the uniformity in the size of the crystals formed. With similar molecules form similar crystal sizes and this will all for a similar shape of the solid rock material. While different molecules within a rock material will form dissimilar crystals and lead to the formation of entirely different crystals within the solid rock materials.
In fact we can tell what kind of molecules are in the solid crystals and rock materials based on the size and shape that the crystals take following crystallization. We can also tell the process that was used to form the crystals all based on the shape of the crystals being formed within the rock structures. This activity will us to examine process of crystal formation through two principal means of crystallization, either evaporation or sediment cooling using simple kitchen chemistry and a hand-held magnifying glass.