sedimentary

Sandstone (Quartz-rich)

Arenite (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale for grains); Color: Tan, brown, or earthy yellow; Luster: Dull or earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 (Mohs scale for grains)
Color: Tan, brown, or earthy yellow
Luster: Dull or earthy

Identified June 20, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale for grains); Color: Tan, brown, or earthy yellow; 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. Typically deposited in deserts, river beds, or beaches over millions of years.

Uses & applications

Commonly used as a building material, for paving stones, grindstones, and in glass manufacturing if the quartz content is high.

Geological facts

Sandstone makes up about 10-20% of all sedimentary rocks on Earth. It is often porous and can act as an important aquifer for groundwater or a reservoir for oil and gas.

Field identification & locations

Identify in the field by its gritty texture (feels like sandpaper) and visible sand grains. Found globally in canyon walls, coastal cliffs, and desert outcrops.