Fused silica, also known as fused quartz, is a high-purity form of silicon dioxide (SiO2) that is produced by melting high-purity silica sand at extremely high temperatures and then cooling it rapidly to form a glass-like material. Fused silica has a range of unique properties that make it suitable for various applications. The unique combination of properties such as high purity, thermal stability, and optical transparency makes fused silica an essential material in various high-tech and precision industries. Uses are Optics and precision instruments, Semiconductor Industry, High Temperature Applications, Precision Casting, Quartz products, Fiber Optics, Laser components, Solar Cells, Astronomy.