Sandstone

Hardness of 6 to 7 on the Mohs scale (due to quartz grains); color ranges from tan, brown, yellow, red, to grey depending on mineral impurities; luster is typically dull to earthy; composed of cemented mineral grains or rock fragments primarily of quartz and feldspar; no distinct crystal structure as it is a clastic rock.

Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, usually in environments such as deserts, rivers, lakes, and shallow marine areas over millions of years.

Widely used in construction as a building material, dimension stone, paving, and occasionally for refractory bricks and abrasive grindstones.

Sandstone layers often act as natural aquifers for groundwater storage and are prime reservoirs for petroleum and natural gas due to their porosity and permeability.

Easily identified by its gritty, sandpaper-like texture and visible mineral grains. Common worldwide, especially in areas with ancient desert or river deposits.