What are the constituents elements of quartz? Is oxygen included in #1?
Quartz
Plants produce oxygen which is needed by humans to survive. Quartz is a hard mineral substance made of several elements. Quartz is composed of silicon and oxygen. Quartz can be melted at high temperatures.
mineral composed of silicon and oxygen atoms in a continuous framework of SiO₄ silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO₂
Could Quartz be useful to humans if plants died off and there was no oxygen?