sedimentary
Red Sandstone
Arenite (SiO2 with Fe2O3)
Hardness: 6-7 Mohs; Color: reddish-brown; Luster: dull/earthy; Texture: granular/gritty; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 Mohs
- Color
- reddish-brown
- Luster
- dull/earthy
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Physical properties
Hardness: 6-7 Mohs; Color: reddish-brown; Luster: dull/earthy; Texture: granular/gritty; Specific Gravity: 2.2-2.8
Formation & geological history
Formed by the accumulation and lithification of sand-sized mineral grains, primarily quartz, in terrestrial or marine environments with iron oxide acting as a staining agent and cement.
Uses & applications
Construction material, landscaping, paving stones, architectural facades, and occasionally as a source of industrial sand.
Geological facts
The red color is typically due to the presence of hematite or other iron oxides. This rock is famous for creating dramatic landscapes like those in the Grand Canyon or Sedona, Arizona.
Field identification & locations
Identified by its gritty sandpaper feel and visible sand grains. Found globally in ancient riverbeds and desert dune deposits. Look for layering or bedding planes.
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