Quartzite (find more information at www.quartzite.com) is classified as a nonfoliated metamorphic rock. As opposed to the foliated metamorphic rocks, the nonfoliated rocks are not distinctly layered. This is probably because nonfoliated rocks were exposed to high temperature conditions, but not to high directional pressure conditions. This being the case nonfoliated metamorphic rocks tend to be highly recrystallized, and sometimes neomorphosed as well.

The parent rock for quartzite is quartz-rich sandstone. As sandstone becomes deeply buried, rising temperature will fuse the grains together forming the extremely hard and weather-resistant rock quartzite. Like marble, quartzite comes in many colors, but when pure it is light-colored. Quartzite tends to have a sugary appearance, and when broken, the fractures cut through the sand grains, not around them as with a sandstone. Concrete Material's current deposit is a Sioux Quartzite and has a light "tifftan pink" color.