Quartz
Quartz is a hard, crystalline mineral composed of silicon and oxygen atoms. The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar
| SiO2 | Al2O3 | Fe2O3 | 'L' Value | 'A' Value | 'B' Value | Loss of Ignition % |
|---|---|---|---|---|---|---|
| 95.47 | 5.62 | 0.19 | 97.86 | 1.16 | 5.32 | 0.49% |
