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Quartz Sandstone
The chemical compound silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with the chemical formula SiO2. It has been known for its hardness since antiquity. Silica is most commonly found in nature as sand or quartz, as well as in the cell walls of diatoms.

Glass typically comprises around 75% silica.
QUARTZ SANDSTONE
Two of the many raw materials of glass is:

limestone and sand
Sand.
The earliest glass, formed when lightning struck a beach, was made of sand which was melted by the lightning. Today's glass is also made of sand, which is mixed with soda ash and lime to reduce costs. http://www.bigsiteofamazingfacts.com/how-is-glass-made

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Lewis Streich

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2y ago

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