sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Hardness: 6-7 Mohs; Color: Tan, beige, yellow; Luster: Dull/Earthy; Structure: Clastic; Texture: Gritty like sandpaper; Specific Gravity: 2.2-2.8

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

Identified July 15, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, beige, yellow; Luster: Dull/Earthy; Structure: Clastic; Texture: Gritty like sandpaper; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral particles or rock fragments in environments like deserts, river deltas, or beaches. Geological age can range from Precambrian to Holocene.

Uses & applications

Widely used as a construction material (building stone), as a source of silica for glass making, and in paving and masonry. Also popular for decorative garden stones.

Geological facts

Sandstone rocks can act as natural reservoirs for water and petroleum due to their high porosity. Famous formations include the Antelope Canyon in Arizona and Petra in Jordan.

Field identification & locations

Identified by its gritty texture and visible sand grains. It is extremely common worldwide; collectors should look for specimens with interesting bedding layers or ripple marks.