Crystals are naturally occurring structures that are found all over the world. They are composed of atoms, molecules, or ions that are arranged in a highly ordered, repeating pattern. These patterns can be seen in the shape of the crystal, as well as in its internal structure. Crystals can be found in a wide variety of environments, including in rocks and minerals, in soils and sediment, and in bodies of water. They can also be found in living organisms, such as in the crystals that make up the shells of certain types of mollusks. One of the most common places...