sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
Hardness: 6-7 on the Mohs scale (depending on cementation), Color: Varies widely including tan, brown, yellow, red, grey, pink, and white, Luster: Dull to earthy, Crystal structure: Clastic texture composed of mineral particles or rock fragments, Cleavage: None, Specific Gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 on the Mohs scale (depending on cementation), Color: Varies widely including tan, brown, yellow, red, grey, pink, and white, Luster: Dull to earthy, Crystal structure: Clastic texture composed of mineral particles or rock fragments, Cleavage: None, Specific Gravity: 2.2-2.8
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments (predominantly quartz) usually derived from weathering and erosion of other rocks, deposited in environments like deserts, rivers, beaches, and shallow marine settings over millions of years.
Uses & applications
Commonly used in construction as building stone, paving material, flagstones, and in the production of concrete and glass.
Geological facts
Many of the world's most famous monuments and ancient structures, such as Petra in Jordan and the temples of ancient Egypt, are carved directly out of massive sandstone formations.
Field identification & locations
Easily identified by its gritty, sandpaper-like texture and visible sand-sized grains. Found worldwide in sedimentary basins and exposed cliff faces.
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