sedimentary

Sandstone (Quartzose)

Arenite (SiO2 principal composition)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale); Color: Brown, tan, reddish due to iron oxide; Luster: Dull/Earthy; Texture: Granular (feels like sandpaper); Porosity: High.

Hardness: 6-7 (Mohs scale)
Color: Brown, tan, reddish due to iron oxide
Luster: Dull/Earthy

Identified July 6, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Brown, tan, reddish due to iron oxide; Luster: Dull/Earthy; Texture: Granular (feels like sandpaper); Porosity: High.

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments. Typically deposited in riverbeds, deserts, or marine environments over millions of years.

Uses & applications

Used widely in construction for building stone, pavers, and as decorative landscaping rock. High-purity sandstone is used in glass manufacturing.

Geological facts

Sandstone makes up about 20-25% of all sedimentary rocks on Earth. It is a vital reservoir rock for groundwater, oil, and natural gas due to its high porosity and permeability.

Field identification & locations

Identify by its gritty texture and visible sand grains. It common in canyon lands and river valleys. For collectors, look for ripple marks or cross-bedding indicating ancient water or wind flow.