The mineral commonly used to make glass is silica, primarily in the form of sand. Silica, chemically known as silicon dioxide (SiO2), is a key ingredient in glass production due to its ability to melt at high temperatures and form a solid, transparent material upon cooling. The glassmaking process involves heating silica together with other materials, such as soda ash and limestone, to produce a mixture that can be shaped into various forms. Silica's purity is crucial in producing high-quality glass, as impurities can affect the clarity and color. The versatility of glass has made it an essential material in countless applications.