Quartz is a 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. Glass is made from quartz sand because it is an abundant material and its melting temperature is suitable for glassmaking.
Quartz is one of the hardest minerals on Earth, making it extremely difficult to work with. It can be challenging to cut, drill and polish due to its hardness. However, once quartz has been processed and cut into the desired shape, it can be quite beautiful. When used in jewelry or other decorative items, quartz can add a touch of elegance and luxury.