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What is Quartzite?

Quartzite is a decorative stone. It may cover walls, roofing tiles, flooring, and stair steps. Its use for countertops in kitchens is expanding rapidly. It is harder and more resistant to stains than granite.

Uses

Crushed quartzite is hard and angular. Therefore, it is railway ballast. The crushed material is in road construction. High purity quartzite produces ferrosilicon, industrial, silicon and silicon carbide. During the Stone Age, quartzite flint, quartz, and other lithic raw materials made stone tools.

It's Origin

The decorative stone is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. Through heating and pressure, sandstone converts into quartzite. Usually, it relates to tectonic compression within orogenic belts. In its purest form, it is usually white to grey, though it often occurs in various shades of pink and red due to varying amounts of iron oxide (Fe2O3). Other colors, such as yellow, green, blue and orange, are due to other mineral impurities. 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 stone.

Occurrences In the United States, formations of quartzite can be found in some parts of:

  • Pennsylvania
  • eastern South Dakota
  • Central Texas
  • southwest Minnesota
  • Devil’s Lake State Park in the Baraboo Hills in Wisconsin
  • near Salt Lake City, Utah
  • in the Appalachians and other mountain regions

Quartzite is also found in the Morenci Copper Mine in Arizona. The town of Quartzsite in western Arizona derives its name from the quartzites in the nearby mountains in both Arizona and Southeastern California. A glassy vitreous quartzite has been described from the Belt Supergroup in the Coeur d’Alene district of northern Idaho. (credit Wikipedia)

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. Most or all of the original texture and sedimentary structures of the sandstone are erased by the metamorphism.

Stone Spirit News

Stone Spirit Inc. has over 19 years of experience in the fabrication and installation of countertops. It has been one of the top professional companies providing quality services in the installation of granite, quartz, and marble countertops. Stone Spirit is utilizing the latest technology in the industry and it provides the best quality results!

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