Sandstone is a sedimentary rock . It is formed by compaction and consolidation of sand, which is together by a natural cementing material , such as silica. Sandstone is made of sand cemented by silica, iron, lime etc . It is quartz based stone . It is one of the hardest and toughest material . even it is harder then granite. Sandstone is mined by quarrying. Commonly sandstone is composed of quartz and feldspar. It is widely used for stonecraft.