sedimentary

Sandstone

Arenite

Hardness: 6-7 Mohs; Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal Structure: Clastic (grain-based); Texture: Gritty like sandpaper; Specific Gravity: 2.2-2.8

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

Identified July 4, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal Structure: Clastic (grain-based); Texture: Gritty like sandpaper; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments (clasts) usually by silica, calcium carbonate, or iron oxide in ancient rivers, deserts, or marine environments.

Uses & applications

Extensively used in construction as a building stone, in the making of glass, as an abrasive for grinding, and as a reservoir rock for oil and natural gas.

Geological facts

Sandstone is one of the most common sedimentary rocks. It often preserves fossils, ripple marks, and cross-bedding structures that provide clues about Earth's ancient environments.

Field identification & locations

Identify by its gritty texture (feels like sandpaper when rubbed). Is commonly found in desert outcrops, canyon walls, and riverbeds. Look for visible layering or bedding planes.