sedimentary

Red Sandstone

Sandstone (hematitic/iron-rich quartzite or arenite)

AI-generated identification · may be incorrect

Hardness: 6-7 on the Mohs scale depending on cementation; Color: reddish-brown, maroon, dark pink-red; Luster: dull to earthy, slightly sugary visual texture; Grain size: medium to fine quartz grains bound by silica or iron oxide cement.

Hardness: 6-7 on the Mohs scale depending on cementation
Color: reddish-brown, maroon, dark pink-red
Luster: dull to earthy, slightly sugary visual texture

Identified July 23, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the compaction and cementation of sand-sized grains, primarily quartz, in arid desert, riverbed, or delta environments where iron oxide (hematite) coated the grains to give it a distinct reddish color.

Uses & applications

Widely used as building stone, flagstone, paving material, and decorative landscaping rock.

Geological facts

Red sandstone is responsible for famous geological features around the world, such as the red rock formations in Sedona, Arizona, and the ancient city of Petra in Jordan.

Field identification & locations

Identify in the field by its distinct sand-like texture (feeling like fine sandpaper) and reddish-brown iron oxide coloration. Found abundantly worldwide in sedimentary basin regions.