Quartzite is a hard rock which was originally pure quartz sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pink and red due to varying amounts of iron oxide. Other colors, such as yellow, green, blue and orange, are due to other minerals. When sandstone is cemented to quartzite, the individual quartz grains recrystallize along with the former cementing material to form an interlocking mosaic of quartz crystals. The grainy, sandpaper-like surface becomes glassy in appearance. Minor amounts of former cementing materials, iron oxide, silica, carbonate and clay, often migrate during recrystallization and metamorphosis. This causes streaks and lenses to form within the quartzite.https://vimeo.com/269821000
Quartzite is very resistant to chemicals and is a decorative stone as flooring, and stair steps. Its use for countertops in kitchens is expanding rapidly. It is harder and more resistant to stains than granite. Quartzite is very heat resistant, doesn’t scratch like other surfaces can, and being a natural product, each slab offers exquisite one-of-a-kind looks to give your countertop a unique design. In an impressive array of colors, and veining that runs soft and subtle to bold and beautiful.