sedimentary

Sandstone

Arenite (primarily SiO2)

Hardness: 6-7 Mohs; Color: Tan, beige, brown; Luster: Dull/Earthy; Crystal structure: Clastic (grainy texture); Cleavage: None; Specific Gravity: 2.2-2.8

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

Identified June 16, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, beige, brown; Luster: Dull/Earthy; Crystal structure: Clastic (grainy texture); Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation and cementation of mineral particles or rock fragments of sand size, typically in river beds, beaches, or deserts over millions of years.

Uses & applications

Used widely in construction for building stone, pavers, and as a source of silica for glass manufacturing.

Geological facts

Sandstone makes up about 20% of all sedimentary rocks on Earth. Famous landmarks like the Grand Canyon exhibit massive layers of various sandstone types.

Field identification & locations

Identified by its 'sandpaper' feel and visible grains. Often found near current or ancient water bodies. Collectors should look for unique cross-bedding or fossils within the layers.