sedimentary
Red Sandstone
Sandstone (Quartz Arenite / Arkose with Hematite cement)
Hardness: 6-7 (Mohs scale), Color: Red, reddish-brown, Luster: Dull to earthy, Crystal Structure: Granular/clastic matrix, Cleavage: None, Specific Gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 (Mohs scale), Color: Red, reddish-brown, Luster: Dull to earthy, Crystal Structure: Granular/clastic matrix, Cleavage: None, Specific Gravity: 2.2-2.8
Formation & geological history
Formed by the compaction and cementation of sand-sized grains of mineral, rock, or organic material, with iron oxide (hematite) giving it a distinct red coloration. Commonly formed in arid or desert environments.
Uses & applications
Widely used as a construction material, paving stone, decorative landscaping stone, and architectural stone.
Geological facts
The famous red rock formations in places like Sedona, Arizona, and the Grand Canyon are composed primarily of red sandstone layers rich in iron oxides.
Field identification & locations
Identified by its sandy, abrasive texture and characteristic reddish-brown color that does not wash off. Found abundantly in ancient desert basins and sedimentary regions.
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