The primary component of the Earth’s crust is silica, which is primarily found in the form of silicate minerals. The Earth's crust, being the outermost layer, is mainly composed of continental and oceanic crust. Continental crust consists largely of granitic rocks rich in silica and alumina, while oceanic crust is primarily basaltic and denser. Silica's abundance in various minerals contributes to the geological diversity found in the Earth's crust, influencing everything from soil composition to tectonic activity.