sedimentary

Sandstone

Arenite (SiO2 based)

Hardness: 6-7 (Mohs scale), Color: Brown, tan, or reddish, Luster: Dull/Earthy, Crystal Structure: Granular/Clastic, Texture: Gritty like sandpaper

Identified May 28, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale), Color: Brown, tan, or reddish, Luster: Dull/Earthy, Crystal Structure: Granular/Clastic, Texture: Gritty like sandpaper

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in riverbeds, deserts, or marine environments over millions of years.

Uses & applications

Used widely in construction as a building stone, in the production of glass (if high silica content), and for grindstones or artistic sculptures.

Geological facts

Sandstone makes up about 10-25% of all sedimentary rocks and is a major reservoir for groundwater and oil due to its porosity.

Field identification & locations

Identify by its gritty texture and visible sand grains. It is often found in river beds and sedimentary layers. Use a magnifying glass to see the individual cemented grains.