Uses of silica: flat glass, glass products, foundry sand, glass fiber, ceramic glaze, sandblasting for rust prevention, sand for filtration, flux, refractory materials and the manufacture of Lightweight Concrete (Autoclaved Lightweight Concrete). Silica has many uses. Crystals, which are relatively rare in nature, can be used to manufacture important components in the electronic industry, optical instruments and handicrafts. Silica is an important raw material for the manufacture of optical fibers. Generally purer quartz can be used to make quartz glass. Quartz glass has a small expansion coefficient, equivalent to 1/18 of ordinary glass, can withstand drastic changes in temperature, and has good acid resistance (except HF). Therefore, quartz glass is often used to manufacture high temperature resistant chemical instruments. Quartz sand is often used as glass raw material and building material.

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