Quartz
Quartz is a hard, crystallineposed of silicon and oxygen atoms. The atoms are linked in a continuous framework of SiO 4 siliconoxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. Quartz exists in two forms, the normal α






































