sedimentary
Sandstone
Clastic Sedimentary Rock
Mohs hardness typically 6 to 7 (depending heavily on cement type, mainly quartz grains); colors vary widely from white, grey, yellow, red, to brown; dull to earthy luster; granular texture; specific gravity around 2.2 to 2.8.
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Physical properties
Mohs hardness typically 6 to 7 (depending heavily on cement type, mainly quartz grains); colors vary widely from white, grey, yellow, red, to brown; dull to earthy luster; granular texture; specific gravity around 2.2 to 2.8.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, principally quartz and feldspar, usually in environments like deserts, rivers, and beaches over millions of years.
Uses & applications
Widely used as a construction material, for building facades, paving stones, flagstones, and historically for grinding stones and whetstones.
Geological facts
Sandstone formations can store large quantities of groundwater, making them important aquifers. Famous structures like Petra in Jordan are carved directly into sandstone cliffs.
Field identification & locations
Easily identified by its gritty, sandpaper-like texture and visible sand-sized grains. Found worldwide in sedimentary basins and geological layers.
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