sedimentary

Sandstone (Quartzose)

Arenite (composed mainly of SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Greyish-brown, tan, or buff; Luster: Dull/Earthy; Crystal structure: Clastic (granular texture); Cleavage: None; Specific gravity: Approx. 2.2-2.8

Hardness: 6-7 on Mohs scale
Color: Greyish-brown, tan, or buff
Luster: Dull/Earthy

Identified April 15, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Greyish-brown, tan, or buff; Luster: Dull/Earthy; Crystal structure: Clastic (granular texture); Cleavage: None; Specific gravity: Approx. 2.2-2.8

Formation & geological history

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

Uses & applications

Widely used as a construction material (dimension stone), in glass manufacturing (if high purity silica), as an abrasive, and for landscaping or artistic carving.

Geological facts

Sandstone makes up about 20% of all sedimentary rocks on Earth. It often acts as an excellent natural filter and reservoir for groundwater and petroleum because of its porosity and permeability.

Field identification & locations

Identify in the field by its gritty, sandpaper-like feel and visible grains. It is extremely common worldwide in mountainous and coastal regions. Avoid using acid on it unless you suspect a calcitic cement (it will fizz).