Silicon dioxide, commonly known as silica, is a chemical compound composed of silicon and oxygen, with the chemical formula SiO₂. It is an oxide of silicon and one of the most abundant and versatile material families found in nature. Silica occurs naturally in various mineral forms and is also produced synthetically to meet specific industrial requirements. Due to its unique physical and chemical properties, silica is widely used across multiple industries, including glass, ceramics, construction, electronics, and chemical processing.