sedimentary
Sandstone
Sandstone (SiO2 dominant)
AI-generated identification · may be incorrectMohs hardness 6 to 7, earthy to dull luster, granular clastic texture, tan to brownish-grey color, composed primarily of quartz and feldspar grains glued by cement.
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Physical properties
Mohs hardness 6 to 7, earthy to dull luster, granular clastic texture, tan to brownish-grey color, composed primarily of quartz and feldspar grains glued by cement.
Formation & geological history
Formed by the accumulation, compaction, and cementation of sand-sized mineral particles or rock fragments in river, lake, ocean, or desert environments over thousands to millions of years.
Uses & applications
Widely used as a building material, paving stone, flagstone, decorative rock in landscaping, and historically for making grindstones.
Geological facts
Sandstone acts as an important aquifer underground because of its porous nature, storing water and petroleum deposits in geological basins worldwide.
Field identification & locations
Identified by its gritty, sandpaper-like feel and visible small mineral grains held together by natural cements. Found extensively in sedimentary basins, riverbeds, and beach deposits.
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