sedimentary

Sandstone

Arenite (composed primarily of SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (on Mohs scale if quartz-rich); Color: Tan, brown, or grey; Luster: Dull or earthy; Crystal structure: Clastic (grainy texture); Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 (on Mohs scale if quartz-rich)
Color: Tan, brown, or grey
Luster: Dull or earthy

Identified April 2, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (on Mohs scale if quartz-rich); Color: Tan, brown, or grey; Luster: Dull or earthy; Crystal structure: Clastic (grainy texture); Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in deserts, riverbeds, or beaches. It can range from various geological ages, frequently Paleozoic to Cenozoic.

Uses & applications

Commonly used as a building material, in the manufacture of glass (if high silica), for paving stones, and as a reservoir rock for groundwater, oil, and gas.

Geological facts

Sandstone represents approximately 20% of all sedimentary rocks on Earth. Familiar landmarks like the Grand Canyon or the red rocks of Sedona are primarily composed of various sandstone layers.