Silicates are a group of minerals that contain silicon and oxygen, forming the largest class of minerals in the Earth's crust. They are essential components of rocks and are classified based on their structure, which can range from simple silicate tetrahedra to complex frameworks. Common examples include quartz and feldspar, which are vital in various geological processes. These minerals play a crucial role in the formation of igneous, metamorphic, and sedimentary rocks. Silicates are not only important in geology but also have applications in industries such as ceramics, glass, and electronics, showcasing their versatility and significance in both natural and human-made environments.