sedimentary

Sandstone with Iron Staining

Clastic sedimentary rock (SiO2 with iron oxides)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale), Color: Tan to reddish-brown with dark banding, Luster: Dull/Earthy, Texture: Granular, Clastic, Porous

Luster: Dull/Earthy, Texture: Granular, Clastic, Porous

Identified July 4, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale), Color: Tan to reddish-brown with dark banding, Luster: Dull/Earthy, Texture: Granular, Clastic, Porous

Formation & geological history

Formed by the accumulation and cementation of mineral particles or rock fragments of sand size. The dark band represents a concentrated layer of iron oxide (hematite or goethite) or manganese minerals precipitated by groundwater.

Uses & applications

Commonly used in construction, landscaping, and as a decorative stone. High-quality sandstone is used for grindstones and glass manufacture.

Geological facts

Sandstone makes up about 10 to 20 percent of all sedimentary rocks on Earth. The distinct banding is often called Liesegang rings when it forms in concentric patterns.

Field identification & locations

Identified in the field by its gritty texture (feels like sandpaper) and visible sand grains. Found globally in basins and ancient riverbeds. To verify, check if it can scratch glass (due to quartz content).