Sandstone is a sedimentary rock composed mainly of sand-size mineral or rock grains. Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any color, but the most common colors are tan, brown, yellow, red, gray and white. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions.
Marble exports was founded by aldoukangroup.com in 1998 , it was created to serve the group’s growing need for marble flooring , cladding , counter tops , water jet and marble mosaics . It expanded later to include machine cut mosaics and hand cut mosaics .