sedimentary

Sandstone

Arenite (SiO2 based clastic rock)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Tan, beige, brown; Luster: Dull/Earthy; Structure: Clastic, granular texture; Specific Gravity: 2.2-2.8

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

Identified July 14, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, beige, brown; Luster: Dull/Earthy; Structure: Clastic, granular texture; Specific Gravity: 2.2-2.8

Formation & geological history

Formed over millions of years through the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in desert, river, or coastal environments.

Uses & applications

Commonly used as a building material, paving stone, and in the production of glass and industrial abrasives. In small specimens, it is primarily of educational or local interest.

Geological facts

Sandstone represents about 20% of all sedimentary rocks on Earth. The famous red rocks of the Grand Canyon and Petra in Jordan are made primarily of sandstone.

Field identification & locations

Identified by its sandy feel (like sandpaper) and visible grains. Found worldwide in sedimentary basins. Collectors often look for colorful banding or fossil inclusions.