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Silicon dioxide is common in nature. Silicon dioxide is a simple molecule - as the name suggests, two oxygen atoms to one of silicon, and is sometimes referred to by the common name silica. This is neither a rarity in nature nor a substance that is difficult to get hold of. I can pretty well guarantee that you have sat on silicon dioxide, found it in your shoes, even suffered rather crunchy food because of it. A common form of silicon dioxide is sand. Though chemically identical to the sand form, it is also possible for silicon dioxide to form much more extensive crystals. Sand grains range in size between a twentieth of a millimetre and two millimetres, but silicon dioxide can crystallize in large lumps, where it has a milky transparency. In this form it is known as quartz. Unlike quartz, sand is usually a mix of different minerals, giving it a more varied colouration, but silica usually dominates. In its sand and quartz forms, silica is the most common mineral on earth. 

Ordinary sand, it's main component is Silicon dioxide, it is one of the main components of the material composition of concrete and mortar, civil engineering bulk material. There are some, king Gelon, who think that the number of the sand is infinite in multitude; and I mean by the sand not only that which exists around Syracuse and the rest of Sicily but also that which is found in every region whether inhabited or uninhabited. Again there are some who, without regarding it as infinite, yet think that no number has been named which is great enough to exceed its magnitude. 

The larger crystals of silicon dioxide in their quartz form may seem less useful, more decorative than practical, but quartz came into its own with the discovery of its piezoelectric capabilities. Quartz can act as an interface between physical force and electrical current. This effect works both ways. Put pressure on a quartz crystal and it generates electricity, or put a voltage across it and it will vibrate, producing regular oscillations that can be used as a timer. Quartz oscillators have been used since the 1920s to make accurate clocks, and are still used today in watches and even computers. In inland (such as deserts) and non-tropical coast (such as sand) environment, the most common constituent of sand is silica (silicon dioxide SiO2). Normally, silicon exists in the form of quartz. Feldspathic sandstone is a feldspar (aluminum) with high content of sand or sandstone,  formed by granite weathering and erosion.


 

 

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