The major component of the Earth's crust is silicon, primarily in the form of silicate minerals. The Earth's crust is composed of a variety of rocks and minerals, with silicon dioxide being a predominant compound found in many types of igneous and sedimentary rocks. Other significant components include aluminum, iron, calcium, sodium, potassium, and magnesium. These elements combine to form various minerals, contributing to the diverse geological features of the Earth's surface. Silicon plays a crucial role in the formation of minerals such as quartz, feldspar, and mica, which are essential to understanding the composition and structure of the Earth's crust.