Is quartz a mineral?

Quartz is a mineral composed of silicon dioxide commonly used in glass-making and electronic applications. It is highly common on the Earth's surface and is the most abundant mineral found in the continental crust.

Quartz is found in a variety of rocks, and forms in several conditions, which may result in a wide range of colors displayed by the mineral. It forms hexagonal crystal structures if allowed to grow in open spaces, such as caves. It is typically translucent or transparent with a glassy luster. It has a high hardness level, allowing it to be used as a material for sanding, grinding and other applications that require an abrasive mineral.