Quartz is the most abundant and widely distributed mineral found on Earth's surface. ABS supply a wide range of quartz. Silica, or more correctly silicon dioxide SiO2, is one of the most abundant compounds on the surface of the Earth, being most obvious as quartz and common sand. Silica has a multitude of uses depending on the degree of purity. Grades up to 99.99% SiO2 are used in the manufacture of glass, optical fibers, ceramics etc.