quartz
Quartz is the most abundant and widely distributed mineral on the Earth's surface. It is present and abundant in all regions of the world. It forms at all temperatures. It is abundant in igneous, metamorphic and sedimentary rocks. It is very resistant to mechanical and chemical bad weather. This durability makes it the dominant mineral on mountain peaks and the main constituent of beach, river and desert sand. Quartz is omnipresent, abundant and durable. There are deposits exploitable all over the world. Quartz is one of the most useful natural materials. Its usefulness can be linked to its physical and chemical properties. It has a hardness of seven on the Mohs scale, which makes it very durable. It is chemically inert on contact with most substances. Its electrical properties and resistance to heat make it a valuable material for electronic products. Its luster, color and diaphanousness make it useful as a precious stone and also in the menufacture of glass.
Learn more about quartz: Wikipedia