sedimentary

Sandstone

Sandstone (clastic sedimentary rock composite)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale); Color: Tan, brownish-grey, or buff; Luster: Dull/Earthy; Texture: Gritty, medium-grained sand particles; Specific Gravity: 2.2-2.8

Hardness: 6-7 (Mohs scale)
Color: Tan, brownish-grey, or buff
Luster: Dull/Earthy

Identified July 20, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Tan, brownish-grey, or buff; Luster: Dull/Earthy; Texture: Gritty, medium-grained sand particles; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments (clasts) usually in river beds, deserts, or coastal environments over millions of years.

Uses & applications

Commonly used as a building material, in the manufacture of glass (if high silica content), as a grinding stone, and increasingly in landscaping.

Geological facts

Sandstone makes up about 10-20% of all sedimentary rocks on Earth. Its porosity makes it a major reservoir for groundwater, oil, and natural gas.

Field identification & locations

Identify in the field by its sandpaper-like feel and visible grains of sand (often quartz). It can be found globally in outcrop formations and river basins.