sedimentary

Sandstone

Arenite

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Tan, brown, or buff; Luster: Dull/Earthy; Crystal structure: Clastic (composed of sand-sized grains); Cleavage: None; Specific gravity: 2.2-2.8.

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

Identified May 14, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, brown, or buff; Luster: Dull/Earthy; Crystal structure: Clastic (composed of sand-sized grains); Cleavage: None; Specific gravity: 2.2-2.8.

Formation & geological history

Formed via the accumulation and lithification of sand-sized mineral particles or rock fragments, typically in riverbeds, deltas, or deserts. Can range in age from Precambrian to recent formations.

Uses & applications

Extensively used in construction for flagstone, building cladding, and as an abrasive in industry. Finely textured pieces are popular in landscaping.

Geological facts

Sandstone records fossilized environmental conditions, such as ripple marks from ancient water or cross-bedding from ancient dunes. It makes up roughly 20 to 25% of all sedimentary rocks.

Field identification & locations

Identify in the field by its gritty 'sandpaper' feel. Small grains should be visible to the naked eye. Often found in layered outcrops or as water-rounded stones in riverbeds.