sedimentary

Sandstone

Arenite

Hardness: 6-7 Mohs; Color: Gray, tan, or brown; Luster: Dull or earthy; Texture: Granular and gritty like sandpaper; Specific gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Gray, tan, or brown
Luster: Dull or earthy

Identified July 17, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Gray, tan, or brown; Luster: Dull or earthy; Texture: Granular and gritty like sandpaper; Specific gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments over millions of years in environments like beaches, deserts, or river deltas.

Uses & applications

Widely used in construction as a building material, for paving stones, grindstones, and as a reservoir rock in the petroleum industry.

Geological facts

Sandstone accounts for about 20% of all sedimentary rocks on Earth. It often preserves fossils and sedimentary structures like ripple marks or cross-bedding.

Field identification & locations

Identify by its gritty texture and visible sand grains. It is commonly found in sedimentary basins and eroded canyon walls. Used by collectors for its variety of colors and patterns.