sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale (due to quartz); Color: Tan, brown, and white banding; Luster: Dull to earthy; Structure: Granular/clastic; Cleavage: None; Specific Gravity: 2.2–2.8

Hardness: 6-7 on Mohs scale (due to quartz)
Color: Tan, brown, and white banding
Luster: Dull to earthy

Identified March 7, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale (due to quartz); Color: Tan, brown, and white banding; Luster: Dull to earthy; 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 (lithification). These often form in river beds, beaches, or desert environments over millions of years (Paleozoic to Cenozoic eras).

Uses & applications

Used widely as a building material, paving stone, and in the manufacturing of glass. It is also an important reservoir rock for groundwater and petroleum.

Geological facts

Sandstone makes up approximately 20-25% of all sedimentary rocks on Earth. Famous landmarks like the Grand Canyon and Petra are primarily carved from sandstone layers.

Field identification & locations

Identify by its 'sandpaper' feel and visible layers of sediment (bedding). Commonly found in dry riverbeds, canyons, and coastal cliffs. Collectors should look for unique banding or patterns caused by iron oxidation.