sedimentary

Red Sandstone

Arenite (with Iron Oxide)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale), Color: Reddish-brown to pink, Luster: Dull/Earthy, Crystal Structure: Clastic grainy texture, Cleavage: None, Specific Gravity: 2.2-2.8

Identified July 14, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale), Color: Reddish-brown to pink, Luster: Dull/Earthy, Crystal Structure: Clastic grainy texture, Cleavage: None, Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cemented lithification of sand-sized mineral particles or rock fragments. The red color is due to the presence of iron oxide (hematite) during the deposition in terrestrial or shallow marine environments.

Uses & applications

Commonly used as a building material, paving stone, and in landscaping. Polished varieties are sometimes used in decorative ornaments.

Geological facts

Sandstone makes up about 20% of all sedimentary rocks on Earth. The famous red rock formations in Sedona, Arizona, and the Grand Canyon are primarily composed of red sandstone layers.

Field identification & locations

Identify by its gritty, sandpaper-like feel and visible grains. Often found in riverbeds, canyons, and desert regions. Collectors look for unique banding or weathering patterns.