Quartzite, a form of granite, is a hard metamorphic rock. Made of sandstone, quartzite is altered by heat and pressure in the ground to form quartzite crystals. The sandstone is transformed into a stronger smoother rock. Streaks and patterns appear where various amounts of pressure bear down on the metamorphosed minerals. Quartzite occurs in various shades of pink and red due to varying amounts of iron oxide. Other colors (such as white or gray) are created from impurities, or minor traces of other minerals. Although Quartzite is a harder rock formation, it is not indestructible. Please be aware that Quartzite requires proper care and maintenance, just like all natural products. Depending on the Quartzite you are using for your countertop, some Quartzite will be more susceptible to etching and staining.