sedimentary

Sandstone

Arenite

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Tan, beige, or yellowish-brown; Luster: Dull/Earthy; Texture: Granular/Sand-like; Cleavage: None; Specific Gravity: 2.2-2.8

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

Identified July 6, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, beige, or yellowish-brown; Luster: Dull/Earthy; Texture: Granular/Sand-like; Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and lithification of sand-sized mineral particles or rock fragments. Most sandstone is composed of quartz or feldspar, deposited by water, ice, or wind in environments like deltas, beaches, or deserts.

Uses & applications

Extensively used in construction for flagstone, building facades, and paving. Also used as a reservoir rock in the petroleum industry and for glass-making if high in silica.

Geological facts

Sandstone is one of the most common types of sedimentary rock and makes up about 10-20% of all sedimentary rocks on Earth. It serves as a vital natural aquifer for groundwater storage.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible grains. Often found in riverbeds, canyons, and coastal bluffs. Collectors should look for unique cross-bedding patterns or color banding.