sedimentary

Sandstone

Arenite (Clastic Sedimentary Rock)

Hardness: 6-7 Mohs; Color: Brown, tan, reddish; Luster: Dull/Earthy; Crystal structure: Granular clastic; Specific Gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Brown, tan, reddish
Luster: Dull/Earthy

Identified June 7, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Brown, tan, reddish; Luster: Dull/Earthy; Crystal structure: Granular clastic; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of mineral grains or rock fragments, typically silicate minerals like quartz and feldspar, in environments such as river beds, deserts, or marine basins.

Uses & applications

Extensively used in construction for paving, building stone, and tiles. Also used as a reservoir rock for oil and natural gas due to its porosity.

Geological facts

Sandstone represents about 10-25% of all sedimentary rocks found on Earth and can preserve incredible fossil records and cross-bedding structures.

Field identification & locations

Identified by its gritty, sandpaper-like texture and visible sand-sized grains. Found globally in sedimentary basins. Look for layered bedding planes in larger outcrops.