sedimentary

Sandstone

Arenite (SiO2 based)

Hardness: 6-7 (on Mohs scale); Color: Brownish-red to tan; Luster: Dull or earthy; Crystal structure: Clastic (grain-supported); Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 (on Mohs scale)
Color: Brownish-red to tan
Luster: Dull or earthy

Identified June 30, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (on Mohs scale); Color: Brownish-red to tan; Luster: Dull or earthy; Crystal structure: Clastic (grain-supported); Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral grains (mostly quartz) in environments such as deserts, river beds, or beaches over millions of years.

Uses & applications

Widely used in construction for paving, load-bearing walls, and as an ornamental building stone due to its durability and aesthetic appeal.

Geological facts

Sandstone can preserve fossilized footprints and ripple marks from ancient water currents, providing a snapshot of prehistoric environments.

Field identification & locations

Identify by its gritty, sandpaper-like texture and visible sand grains. It is extremely common in sedimentary basins worldwide, especially in the American Southwest.