Silica, in the form of silicon dioxide, is the primary mineral used to make glass. Silica sand is melted at high temperatures to form glass, which is then molded into various shapes and products, such as windows, bottles, and containers. The clarity and durability of glass are largely attributed to its silica content. Other ingredients, like soda and lime, are often added to enhance the glass-making process and modify the properties of the final product. The versatility of glass makes it widely used in both commercial and domestic applications.