sedimentary

Sandstone

Arenite

Hardness: 6-7 on Mohs scale; Color: Tan, brown, yellow, red, grey; Luster: Dull/Matte; Structure: Clastic, granular texture (sand-sized grains); Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 on Mohs scale
Color: Tan, brown, yellow, red, grey
Luster: Dull/Matte

Identified May 31, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, brown, yellow, red, grey; Luster: Dull/Matte; Structure: Clastic, granular texture (sand-sized grains); Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of mineral particles (lithification) or rock fragments in environments like deserts, river deltas, or beaches. Ages range from Precambrian to Recent.

Uses & applications

Extensively used in construction as a building stone and paving material. High-purity silica sandstone is used in glassmaking and hydraulic fracturing in the oil industry.

Geological facts

Sandstone makes up about 20-25% of all sedimentary rocks on Earth. Famous geological formations like the Grand Canyon and the red rocks of Sedona are primarily made of sandstone.

Field identification & locations

Identify by its gritty 'sandpaper' feel and visible layers (bedding). Often found in canyons, quarries, and cliffs. Collectors look for unique banding patterns like 'Wonderstone'.