Mineralogy
Mineralogy is the study of minerals. Minerals are things that make rocks. There are many different types of minerals. Some are hard, like diamonds. Some are soft, like talc. Some are metal, like gold or silver. Minerals are put into special groups of minerals made of similar chemicals, or that have similar structures inside. For example, the chemicals that make up some minerals line up in chains, while in other minerals, they make bow-tie shapes.