The mineral most commonly used in the production of glass is silica, primarily in the form of quartz sand. Silica is essential for creating glass due to its high melting point and transparency when heated. This versatility allows for the production of various types of glass, including window panes, containers, and fiber optics. Glass-making is an ancient craft, evolving over centuries, with silica sand being sourced from natural deposits. The properties of silica contribute to the durability and clarity of glass products, making it a fundamental material in various industries.