sedimentary
Sandstone
Sedimentary Rock (Quartz Arenite)
AI-generated identification · may be incorrectHardness: 6 to 7 on the Mohs scale (depending on cementation). Color: Varies widely including gray, tan, yellow, red, and brown due to impurities. Luster: Dull to earthy. Crystal structure: Clastic texture composed of sand-sized mineral particles or rock fragments, primarily quartz. Specific gravity: 2.2 to 2.8.
- Hardness
- 6 to 7 on the Mohs scale (depending on cementation)
- Luster
- Dull to earthy
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Physical properties
Hardness: 6 to 7 on the Mohs scale (depending on cementation). Color: Varies widely including gray, tan, yellow, red, and brown due to impurities. Luster: Dull to earthy. Crystal structure: Clastic texture composed of sand-sized mineral particles or rock fragments, primarily quartz. Specific gravity: 2.2 to 2.8.
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral particles or rock fragments (predominantly quartz) in environments such as deserts, rivers, beaches, and shallow marine areas over millions of years.
Uses & applications
Widely used in construction as a building and paving stone, monument construction, and historically for grindstones.
Geological facts
Sandstone formations often display distinct bedding planes and cross-bedding which tell geologists about ancient wind or water current directions. 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 grains. Commonly found worldwide in sedimentary basins and escarpments.
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