sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Hardness: 6 to 7 (due to quartz grains); Color: Varies widely including tan, brown, yellow, red, grey, and pink; Luster: Dull to earthy; Crystal structure: Clastic (composed of mineral particles or rock fragments cemented together); Cleavage: None; Specific gravity: 2.2 to 2.8

Hardness: 6 to 7 (due to quartz grains)
Luster: Dull to earthy

Identified August 4, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, predominantly quartz and feldspar, usually in environments such as beaches, deserts, flood plains, and rivers over millions of years.

Uses & applications

Commonly used in construction as building stone, paving material, flagstone, and in the manufacture of glass and concrete.

Geological facts

Sandstone formations, such as Zion National Park or Petra in Jordan, create some of the most iconic and colorful landscapes on Earth due to iron oxide staining and wind-blown dune cross-bedding.