sedimentary

Sandstone

Arenite (SiO2 principal)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale), Color: tan/brown/rusty orange, Luster: dull/earthy, Crystal structure: clastic texture, Cleavage: none, Specific gravity: 2.2-2.8

Identified July 16, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale), Color: tan/brown/rusty orange, Luster: dull/earthy, Crystal structure: clastic texture, Cleavage: none, 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 river beds, deserts, or coastal environments over millions of years.

Uses & applications

Construction material, glass manufacturing (high silica varieties), architectural stone, and geological study. Small pebbles like this are common in landscaping and erosion control.

Geological facts

Sandstone represents about 20 to 25 percent of all sedimentary rocks on Earth. The color is usually dictated by the iron oxide or calcium carbonate content of the cementing material.

Field identification & locations

Identified by its gritty sandpaper-like feel. Commonly found in outcroppings, riverbeds, and sedimentary basins. Search for bedding planes when identifying in the field.