Tectosilicates are a group of minerals characterized by their three-dimensional framework structure. This means that the silicon-oxygen tetrahedra are linked together in a way that creates a sturdy and stable arrangement. Common examples of tectosilicates include quartz and feldspar, which are abundant in the Earth's crust and play a crucial role in the formation of rocks. These minerals are important in various geological processes and are often found in igneous, metamorphic, and sedimentary rocks. Their unique structure contributes to their physical properties, such as hardness and resistance to weathering, making them essential components in the study of geology and mineralogy.