sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Hardness: 6-7 (mohs); Color: Tan, beige, or light brown; Luster: Dull or earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 (mohs)
Color: Tan, beige, or light brown
Luster: Dull or earthy

Identified April 10, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (mohs); Color: Tan, beige, or light brown; Luster: Dull or 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 (clasts). Typically forms in desert, river, or coastal environments over millions of years through lithification.

Uses & applications

Commonly used in construction as a building material and decorative stone, in the glass-making industry, and as a reservoir rock for oil and natural gas.

Geological facts

Sandstone accounts for roughly 20-25 percent of all sedimentary rocks on Earth. The famous red rocks of the Grand Canyon are primarily composed of various sandstone layers.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible grains. It is extremely common worldwide in sedimentary basins and outcropping cliffs.