sedimentary

Sandstone (Iron-stained)

Arenite with Limonite/Hematite staining

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs); Color: Orange-brown, tan, ochre; Luster: Dull to earthy; Feel: Gritty (sand-like); Structure: Fine to medium grained clastic sediment

Hardness: 6-7 (Mohs)
Color: Orange-brown, tan, ochre
Luster: Dull to earthy

Identified July 16, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs); Color: Orange-brown, tan, ochre; Luster: Dull to earthy; Feel: Gritty (sand-like); Structure: Fine to medium grained clastic sediment

Formation & geological history

Formed from the compaction and cementation of sand-sized mineral grains or rock fragments. The orange color is due to the oxidation of iron-bearing minerals (limonite or hematite) within the rock matrix or as a coating on grains.

Uses & applications

Used primarily as a building material, decorative stone, and in the manufacturing of glass and concrete. Also serves as a major reservoir for groundwater and petroleum.

Geological facts

Sandstone accounts for approximately 25% of all sedimentary rocks on Earth. The 'red beds' of the American Southwest are famous examples of iron-stained sandstone landscapes.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible layering or bedding planes. It is commonly found in desert environments, riverbeds, and ancient marine basins.