According to the query of the third-level network, crystal belongs to crystal, a kind of rare mineral and gem, and a timely crystal, which belongs to the timely family in mineralogy. The main chemical composition is silicon dioxide, and the chemical formula is SiO2.

Amorphous crystals are usually made by high temperature heating, rapid cooling or physical precipitation. Their irregular structure and disordered arrangement prevent light from completely penetrating the crystal, resulting in different colors or slightly blurred appearance. Amorphous crystal, also known as "timely glass", has high light transmittance and strong wear resistance, and can be used for making jewelry, lenses and other similar applications.