First of all, quartzite should not be mixed with “quartz” which is a mineral. Quartzite is a hard, metamorphic and original sandstone. The quartzite consists of the hardest rocks. It turns into quartzite. Pure quartzite is white where it is gray. But with the effect of iron oxide it is also seen in small quantities in pink and red colors. Quartzite is also seen as the various minerals have small effects.