sedimentary

Sandstone

Arenite

Hardness: 6-7 on Mohs scale; Color: Yellow-brown to tan due to iron oxides; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 on Mohs scale
Color: Yellow-brown to tan due to iron oxides
Luster: Dull/Earthy

Identified June 19, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Yellow-brown to tan due to iron oxides; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments (clasts). Typically formed in river beds, beaches, or deserts over millions of years through lithification.

Uses & applications

Extensively used in construction for grindstones, building stones, and decorative pavers. Finely crushed sandstone is used in the glass-making and hydraulic fracturing industries.

Geological facts

Approximately 20-25% of all sedimentary rocks are sandstones. Some of the world's most famous natural arches and canyon formations, like those in Zion and Arches National Parks, are carved from sandstone.

Field identification & locations

Identify by its gritty, sandpaper-like texture. It occurs worldwide and is often found in outcropping layers or cliffs. Collectors look for unique banding (Leiesegang rings) or fossil inclusions.