sedimentary

Sandstone

Arenite

Hardness: 6-7 (Mohs scale); Color: tan, brown, yellow, red, grey; Luster: dull to earthy; Texture: granular, sandpaper-like feel; Structure: clastic.

Hardness: 6-7 (Mohs scale)
Color: tan, brown, yellow, red, grey
Luster: dull to earthy

Identified July 21, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: tan, brown, yellow, red, grey; Luster: dull to earthy; Texture: granular, sandpaper-like feel; Structure: clastic.

Formation & geological history

Formed from the cementing together of sand-sized grains of mineral, rock, or organic material over millions of years. It marks ancient environment such as deserts, rivers, and beaches.

Uses & applications

Widely used in construction as a building material, paving, and for sharpening tools. It is also an important reservoir rock for groundwater and petroleum.

Geological facts

Sandstone makes up about 20-25% of all sedimentary rocks on Earth. The famous red rock formations in Sedona, Arizona, and the Grand Canyon are composed primarily of sandstone.

Field identification & locations

Identify by its gritty texture (feels like sandpaper). Commonly found in sedimentary basins, riverbeds, and coastal cliffs. Look for visible layers (bedding) and grains of quartz.