sedimentary
Sandstone
Arenite
Hardness: 6-7 Mohs; Color: Tan, beige, or yellowish-brown; Luster: Dull/Earthy; Texture: Granular and gritty like sandpaper; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 Mohs
- Color
- Tan, beige, or yellowish-brown
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, beige, or yellowish-brown; Luster: Dull/Earthy; Texture: Granular and gritty like sandpaper; Specific Gravity: 2.2-2.8
Formation & geological history
Formed from the cementing of sand-sized grains (mostly quartz) over millions of years in environments like beaches, deserts, or river beds through the process of lithification.
Uses & applications
Commonly used as a building material, in paving, for making grindstones, and as a reservoir rock for oil and gas.
Geological facts
Sandstone can withstand weathering for centuries and often preserves fossil footprints and ripple marks from ancient water currents.
Field identification & locations
Identified by its gritty feel and visible sand grains. Found globally in sedimentary basins. Collectors often look for unique erosion shapes or 'pictured' sandstone patterns.
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