Quartzite is a hard, non-foliated metamorphic rock which originally was pure quartz-sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to grey, though quartzites, due to varying amounts of iron oxide often also occur in various shades of pink and red. Other colors such as, yellow, green, blue and orange, are due primarily to other mineral impurities.
Quartzite is a decorative stone and may be used to cover walls, as roofing tiles, flooring and stairs. Its use for countertops in kitchens is also expanding rapidly since. it is harder and more resistant to stains than granite. During the Stone Age, Quartzite was used in addition to flint, quartz, and other lithic raw materials, for making stone tools.