sedimentary

Sandstone (with Iron Staining)

Arenite (Siliclastic sedimentary rock)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale), Color: Brown, tan, reddish-orange due to iron oxidation, Luster: Dull to earthy, Crystal structure: Clastic (composed of mineral grains), Specific Gravity: 2.2-2.8

Identified July 18, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale), Color: Brown, tan, reddish-orange due to iron oxidation, Luster: Dull to earthy, Crystal structure: Clastic (composed of mineral grains), Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in desert, river, or coastal environments. Often dated to various geological eras from Paleozoic to Cenozoic.

Uses & applications

Primarily used in construction as a building material, pavers, or crushed stone. Smaller specimens are common for educational purposes or as simple garden decor.

Geological facts

Sandstone is one of the most common sedimentary rocks on Earth. Over time, the iron within the cementing material oxidizes when exposed to oxygen, giving many specimens a rusty or reddish-brown hue.

Field identification & locations

Identify in the field by its gritty, sandpaper-like texture and visible layered bedding. It is commonly found in riverbeds, canyons, and sedimentary basins worldwide.