sedimentary

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs); Color: Red, reddish-brown; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 (Mohs)
Color: Red, reddish-brown
Luster: Dull/Earthy

Identified June 25, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs); Color: Red, reddish-brown; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and lithification of sand-sized mineral grains or rock fragments, typically in arid desert or river environments. The red color indicates the presence of iron oxide (hematite) during the oxidation process.

Uses & applications

Used extensively in construction as a building stone (brownstone), paving materials, decorative garden stones, and as a reservoir rock for oil and groundwater.

Geological facts

Red sandstone is responsible for some of the world's most spectacular landscapes, such as the Colorado Plateau, the Grand Canyon, and Sedona's red rocks. Its porous nature makes it an excellent natural aquifer.

Field identification & locations

Identify in the field by its gritty, sandpaper-like texture and visible layering (bedding planes). It is commonly found in sedimentary basins throughout the American Southwest and Northern Europe.