Granite is an igneous rock found more abundantly than quartzite, deep in the earth’s crust, providing the base for the many continents’ sedimentary rock. Quartzite consists of a larger volume of quartz than granite—under heat and pressure combined, quartzite is formed from sandstone and quartz, and depending on the amount of pressure to which it is subjected, empty grains of sandstone are stuffed with quartz. This means quartzite is actually harder than granites—on the Mohs scale of hardness from 1 to 10, with 10 being the hardest, granite measures in at around 6-6.5, and quartzite measures in at approximately 7.