Quartzite is a metamorphic rock form characterized by interlocking quartz grains from quartz sandstone.
|Quartzite||Nonfoliated||Quartz sandstone||Composed of interlocking quartz grains|
This example of quartzite is from Warm Springs, Georgia where a stressed formation produces it along with schist and gneiss, two other metamorphic rocks. The formation produces a large warm spring.
Lutgens and Tarbuck