sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
Hardness: 6-7 on Mohs scale (depending on cement), Color: Tan, brown, yellow, red, gray, 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 Mohs scale (depending on cement), Color: Tan, brown, yellow, red, gray, 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 (mostly quartz and feldspar) in environments such as deserts, rivers, and beaches, over millions of years.
Uses & applications
Used extensively in construction as building stone, paving material, and in the manufacture of glass and abrasives.
Geological facts
Sandstone formations often preserve ancient ripple marks and fossilized tracks, providing clues about past environments on Earth. Famous monuments worldwide, including Petra in Jordan, are carved directly into sandstone cliffs.
Field identification & locations
Easily identified by its gritty texture and visible sand grains. Found globally in sedimentary basins, deserts, and coastal regions. Collectors often look for unusual color banding or fossil inclusions.
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