sedimentary
Sandstone
Arenite (Siliclastic Sedimentary Rock)
Hardness: 6-7 (Mohs scale); Color: Tan, yellow, or buff; Luster: Dull/Earthy; Crystal structure: Clastic (sand-sized grains); Cleavage: None; Specific gravity: 2.2-2.8
- Hardness
- 6-7 (Mohs scale)
- Color
- Tan, yellow, or buff
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 (Mohs scale); Color: Tan, yellow, or buff; Luster: Dull/Earthy; Crystal structure: Clastic (sand-sized grains); Cleavage: None; Specific gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of mineral particles or rock fragments (clasts) typically in desert, river, or coastal environments over millions of years.
Uses & applications
Widely used in construction for flagstone and masonry, as an aquifer in geology, and occasionally for grindstones or artistic carving.
Geological facts
Sandstone often preserves ripples from ancient water currents or wind, and is one of the most common types of sedimentary rock found on the Earth's crust.
Field identification & locations
Identify by its gritty texture (feels like sandpaper) and visible layering (bedding). Found globally in sedimentary basins such as the Grand Canyon or various desert regions.
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