sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Reddish-brown to tan; Luster: Dull/Earthy; Crystal Structure: Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 on Mohs scale
Color: Reddish-brown to tan
Luster: Dull/Earthy

Identified May 12, 2026More sedimentary →

Explore Sandstone (Ferruginous) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6-7 on Mohs scale; Color: Reddish-brown to tan; Luster: Dull/Earthy; Crystal Structure: Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains, primarily quartz and feldspar, in environments like deserts, riverbeds, or beaches. The reddish hue indicates the presence of iron oxide (hematite or limonite) as a cementing agent.

Uses & applications

Commonly used as a building material, paving stone, and in the manufacturing of glass and grindstones.

Geological facts

Sandstone makes up about 20% of all sedimentary rocks on Earth. The famous red rock formations in Sedona, Arizona, and Petra, Jordan, are composed of this material.

Field identification & locations

Identify in the field by its gritty, sandpaper-like texture and visible grains. It is commonly found in sedimentary basins and eroded canyonlands worldwide.