Beach material is composed of a variety of materials, including SAND, GLASS, and seasand. SAND is a granular material composed of finely divided rock and mineral particles, typically found on beaches and other coastal areas. GLASS is a transparent or translucent material made from silica, which is often found in the form of broken pieces on beaches. Seasand is a type of SAND that is composed of eroded rocks and minerals from the ocean floor, and is usually found in beach areas.