sedimentary

Red Sandstone

Arenite with Hematite (Fe2O3)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale), Color: Reddish-brown to maroon, Luster: Dull to earthy, Crystal Structure: Granular/Clastic, Cleavage: None (conchoidal fracture), Specific Gravity: 2.2-2.8

Identified June 13, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale), Color: Reddish-brown to maroon, Luster: Dull to earthy, Crystal Structure: Granular/Clastic, Cleavage: None (conchoidal fracture), Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and lithification of sand-sized mineral particles or rock fragments, typically in arid desert or river basin environments. The red color suggests deposition in oxygen-rich terrestrial settings during the Paleozoic or Mesozoic eras.

Uses & applications

Used primarily in building construction as dimension stone, paving, and decorative landscaping. Historically significant as a material for temples and monuments.

Geological facts

The red hue is caused by the oxidation of iron minerals (hematite) coating the sand grains, often referred to as 'red beds'. Famous formations include the Red Rocks of Colorado and the sandstone of Petra, Jordan.

Field identification & locations

Identify by its gritty texture like sandpaper and the presence of distinct white quartz veins or 'skin' as seen in the specimen. Commonly found in desert regions and ancient riverbeds worldwide.