Quartzite is a raw material in No Man's Sky. A chromatic mineral, generated by fusion in the heart of a star. Such stellar material ends up forming deposits in the crust of local planets.
Quartzite is found on planets orbiting purple stars, and can be placed in a Refiner to create purified Chromatic Metal for use in the manufacture of advanced technologies. To craft it, combine Quartzite x1, Chromatic Metal x1 in a Refiner.