sedimentary

Sandstone

Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale); Color: Brown, tan, reddish-brown; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 (Mohs scale)
Color: Brown, tan, reddish-brown
Luster: Dull/Earthy

Identified March 15, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Brown, tan, reddish-brown; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed by the accumulation and cementation of mineral particles or rock fragments (clasts). Generally deposited in river, desert, or marine environments over millions of years through lithification.

Uses & applications

Commonly used in construction as a building material, road base, and for decorative paving or walling. It is also an important reservoir rock for oil and groundwater.

Geological facts

Sandstone makes up about 20% of all sedimentary rocks on Earth. Famous landmarks like the Treasury at Petra and the Grand Canyon are primarily composed of sandstone layers.

Field identification & locations

Identify in the field by its gritty, sandpaper-like texture and visible grains. Often found in areas with ancient sedimentary basins or near cliffs and outcrops in arid regions.