sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
AI-generated identification · may be incorrectHardness: 6-7 (Mohs scale), Color: Reddish-brown to pink due to iron oxide, Luster: Dull/Earthy, Crystal Structure: Granular/Clastic, Cleavage: None.
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Physical properties
Hardness: 6-7 (Mohs scale), Color: Reddish-brown to pink due to iron oxide, Luster: Dull/Earthy, Crystal Structure: Granular/Clastic, Cleavage: None.
Formation & geological history
Formed by the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in arid environments like deserts or riverbeds. The red color indicates the presence of hematite or iron oxide minerals during lithification.
Uses & applications
Used extensively in construction (as dimension stone for buildings), landscaping, paving, and occasionally for minor decorative items.
Geological facts
Red Sandstone is famous for creating the iconic landscapes of the American Southwest, such as the Grand Canyon and Sedona's Red Rocks. It often preserves fossils and ripple marks from ancient environments.
Field identification & locations
Identify by its sandpaper-like texture and visible sand grains. It is commonly found in sedimentary basins and arid regions globally. Collectors look for unique banding or fossil inclusions.
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