Medicines and scanning electron microscopy. Quartz is the most common mineral in the continental crust. Quartz is mined commercially most often in the form of silica sand, sandstone, or in the metamorphic rock quartzite. It is used in making silicon carbide, an abrasive for sand-blasting, grinding glass, sawing and polishing of dimension stone. Finally, it has metallurgical uses as a component in preparation of silicon alloys or as a flux in preparation of elemental phosphorus.
Sulfur is very important in the chemical industries.
It goes into practically everything we eat, wear, and use.