sedimentary

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs); Color: Tan, beige, or light grey; Luster: Dull/Earthy; Crystal structure: Clastic (grains); Cleavage: None (breaks across grains); Texture: Gritty like sandpaper.

Hardness: 6-7 (Mohs)
Color: Tan, beige, or light grey
Luster: Dull/Earthy

Identified June 30, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs); Color: Tan, beige, or light grey; Luster: Dull/Earthy; Crystal structure: Clastic (grains); Cleavage: None (breaks across grains); Texture: Gritty like sandpaper.

Formation & geological history

Formed by the accumulation and lithification of sand-sized mineral particles or rock fragments. Typically deposited in desert, river, or coastal environments over millions of years.

Uses & applications

Used widely in construction for building stone, paving, and as an aggregate. Also used in glass making and as a historical medium for sculpture.

Geological facts

Sandstone makes up about 20% of all sedimentary rocks on Earth. The famous Red Rocks of Colorado and the ancient city of Petra are both made of sandstone.

Field identification & locations

Identify by its gritty texture (rubbing it often releases individual sand grains). It often displays visible layering called bedding planes. Found in sedimentary basins worldwide.