sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
Hardness of 6 to 7 on the Mohs scale; varies in color from white, grey, yellow, red, to brown due to impurities; dull to earthy luster; clastic crystal structure composed mostly of quartz grains; specific gravity around 2.2 to 2.8.
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Physical properties
Hardness of 6 to 7 on the Mohs scale; varies in color from white, grey, yellow, red, to brown due to impurities; dull to earthy luster; clastic crystal structure composed mostly of quartz 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, chiefly quartz and feldspar, in environments such as deserts, rivers, and beaches over millions of years.
Uses & applications
Widely used in construction, as a building material, paving stone, for decorative landscaping, and historically for grinding stones.
Geological facts
Sandstone formations can store large amounts of water, serving as valuable aquifers. Famous monuments worldwide, including ancient temples and modern buildings, are constructed from sandstone.
Field identification & locations
Easily identified by its gritty texture, visible sand grains, and often distinctive parallel bedding layers. Found globally in sedimentary basins.
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