sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Hardness: 6-7 on Mohs scale (due to quartz content); Color: Tan, beige, or gray; Luster: Dull/Earthy; Crystal structure: Clastic (granular texture); Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 on Mohs scale (due to quartz content)
Color: Tan, beige, or gray
Luster: Dull/Earthy

Identified June 30, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale (due to quartz content); Color: Tan, beige, or gray; Luster: Dull/Earthy; Crystal structure: Clastic (granular texture); Cleavage: None; Specific gravity: 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 river, desert, or marine environments over millions of years.

Uses & applications

Extensively used in construction for building stone, road base, and as a raw material in the manufacture of glass and concrete.

Geological facts

Sandstone is one of the most common sedimentary rocks on Earth. It often preserves fossils and sedimentary structures like ripple marks or cross-bedding that reveal ancient environments.

Field identification & locations

Identify in the field by its gritty 'sandpaper' feel and visible grains. Often found in layered outcrops or canyons. Look for bedding planes and uniform grain size.