A mineral group is a classification of minerals that share similar chemical compositions and crystal structures. These groups help scientists and geologists understand the properties and behaviors of different minerals. Common examples of mineral groups include silicates, carbonates, and oxides, each defined by their unique chemical characteristics. Within each mineral group, individual minerals can vary widely in appearance and properties. For instance, the silicate group includes minerals like quartz and feldspar, which are essential components of many rocks. Understanding mineral groups is crucial for identifying minerals and studying their roles in Earth's geology.