sedimentary
Sandstone
Sedimentary rock composed mainly of quartz sand
Hardness of 6 to 7 on the Mohs scale, typically pinkish-red to brown in color, dull or earthy luster, clastic texture with visible sand grains, specific gravity around 2.2 to 2.8.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, typically pinkish-red to brown in color, dull or earthy luster, clastic texture with visible sand grains, specific gravity around 2.2 to 2.8.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, most commonly quartz and feldspar, often in desert, river, or beach environments over millions of years.
Uses & applications
Commonly used in construction, building facades, paving stones, and as an aquifer reservoir rock for groundwater and petroleum.
Geological facts
Many of the world's most famous monuments and ancient structures, including parts of the Petra in Jordan and numerous cathedrals, are carved directly out of sandstone formations.
Field identification & locations
Identified easily by its gritty texture and visible sand-sized grains. Found worldwide in sedimentary basins, riverbeds, and desert regions. Great for amateur collectors learning about sedimentary rock cycles.
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