sedimentary
Sandstone
Arenite
Hardness: 6-7 Mohs; Color: Tan, yellow, or white with iron staining; Luster: Dull or earthy; Crystal structure: Clastic (grains of quartz/feldspar); Cleavage: None; Specific gravity: 2.2-2.8
- Hardness
- 6-7 Mohs
- Color
- Tan, yellow, or white with iron staining
- Luster
- Dull or earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, yellow, or white with iron staining; Luster: Dull or earthy; Crystal structure: Clastic (grains of quartz/feldspar); Cleavage: None; Specific gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of mineral particles or rock fragments (clasts) usually in river, lake, or ocean environments over millions of years.
Uses & applications
Widely used in construction for building stone, road base, and as a raw material for making glass or sandpaper.
Geological facts
Sandstone holds nearly 25% of the world's groundwater and oil/gas reserves due to its natural porosity and permeability.
Field identification & locations
Identify by its gritty, sandpaper-like feel and visible grains. Often found in canyon walls, riverbeds, and sedimentary basins worldwide.
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