sedimentary

Sandstone

Arenite (mainly SiO2 with varying cements)

AI-generated identification · may be incorrect

Mohs hardness: 6-7 (individual grains), color: tan, brown, or grayish; luster: dull; texture: clastic (gritty like sandpaper); specific gravity: 2.2-2.8

Hardness: 6-7 (individual grains), color: tan, brown, or grayish
Color: tan, brown, or grayish
Luster: dull

Identified July 1, 2026More sedimentary →

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Physical properties

Mohs hardness: 6-7 (individual grains), color: tan, brown, or grayish; luster: dull; texture: clastic (gritty like sandpaper); specific gravity: 2.2-2.8

Formation & geological history

Formed by the accumulation and lithification of sand-sized mineral grains, most commonly quartz and feldspar, in environments such as deserts, riverbeds, and beaches.

Uses & applications

Extensively used as a building material, in the manufacture of glass, as road base, and for architectural cladding.

Geological facts

Sandstone can preserve fossilized footprints and ripple marks from ancient environments, providing a snapshot of life millions of years ago. It makes up about 20% of all sedimentary rocks on Earth.

Field identification & locations

Identify by its gritty texture and visible layers. It often reacts weakly or not at all to acid (unlike limestone) and can be easily scratched off into sand grains.