How do the most common elements in earth's crust appear?

Answer 1

The most common elements are Silicon (Si) and Oxygen (O). They appear together as tetrahedra (SiO4), which can be linked in various ways. For quite a lot of minerals, this silica tetrahedra make up significant parts.

Answer 2

The most common elements in Earth's crust are oxygen, silicon, aluminum, and iron. Oxygen is typically found in minerals as oxygen ions, giving them a variety of colors including white, gray, and pink. Silicon is found in minerals such as quartz and appears as a hard, translucent crystal. Aluminum is often found in minerals like feldspar and appears as a silvery metal. Iron is found in minerals like hematite and appears as a shiny, metallic silver-grey color.