Glassmaking is an ancient art form that requires the use of specific materials. Two of the most important materials used in glassmaking are SAND and frit. SAND is a naturally occurring granular material composed of finely divided rock and mineral particles. Frit is a type of glass made from a mixture of silica, soda, and lime. Both SAND and frit are essential components of glassmaking, as they provide the raw materials needed to create glass.