sedimentary

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (SiO2 dominated)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale (due to quartz grains); Color: Tan, brownish-beige, or buff; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 on Mohs scale (due to quartz grains)
Color: Tan, brownish-beige, or buff
Luster: Dull/Earthy

Identified June 15, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale (due to quartz grains); Color: Tan, brownish-beige, or buff; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; 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 deposited in riverbeds, deserts, or coastal environments. Age varies from Precambrian to Holocene.

Uses & applications

Commonly used in construction as building stone or pavers, as an abrasive for grinding, and as a reservoir rock in the petroleum industry for oil and natural gas.

Geological facts

Sandstone is one of the most common sedimentary rocks in the Earth's crust. Most sandstones are composed of quartz or feldspar because these are the most resistant minerals to weathering.

Field identification & locations

Identify in the field by its gritty 'sandpaper' texture and visible mineral grains. It often displays bedding or layering. Found globally in canyon walls and outcrop formations.