What is the difference between Quartzites and Granites?
Granite is a type of volcanic rock that is more plentiful than quartzite deep inside the earth’s crust and serves as the foundation for sedimentary rock on many continents. Quartzite is made from sandstone and quartz when heat and pressure are combined, and depending on the amount of pressure used, vacant grains of sandstone are packed with quartz. This means that quartzite is really harder than granites: on the Mohs scale of hardness, which ranges from 1 to 10, with 10 being the hardest, granite is around 6-6.5 while quartzite is around 7.
