sedimentary

Sandstone

Arenite (specifically Quartz Arenite)

Hardness: 6-7 Mohs; Color: Tan, beige, or light brown; Luster: Dull or earthy; Crystal structure: Granular/clastic; Specific gravity: 2.2-2.8. Feels abrasive like sandpaper.

Hardness: 6-7 Mohs
Color: Tan, beige, or light brown
Luster: Dull or earthy

Identified July 10, 2026More sedimentary →

Explore Sandstone in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6-7 Mohs; Color: Tan, beige, or light brown; Luster: Dull or earthy; Crystal structure: Granular/clastic; Specific gravity: 2.2-2.8. Feels abrasive like sandpaper.

Formation & geological history

Formed over millions of years by the accumulation and cementation of sand-sized mineral particles, typically quartz or feldspar, in environments such as beaches, deserts, or river deltas.

Uses & applications

Used extensively as a building material, paving stone, and decorative landscaping rock. In industry, it is a source of silica for glassmaking.

Geological facts

Sandstone can preserve incredibly detailed fossils and ancient ripple marks from prehistoric sea floors. It accounts for about 20% of all sedimentary rocks on Earth.

Field identification & locations

Identify by its gritty texture and visible sand grains. It is extremely common worldwide. Look for flat bedding planes or cross-bedding indicating ancient wind or water currents.