sedimentary

Coarse Sandstone

Arenite (SiO2 based)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale); Color: Tan, beige, or grey; Luster: Dull/Earthy; Crystal structure: Clastic (granular texture); Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 (Mohs scale)
Color: Tan, beige, or grey
Luster: Dull/Earthy

Identified March 9, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Tan, beige, or grey; Luster: Dull/Earthy; Crystal structure: Clastic (granular texture); Cleavage: None; Specific gravity: 2.2-2.8

Formation & geological history

Formed by the accumulation and cementation of mineral particles (lithification) in high-energy environments like riverbeds or coastal dunes over millions of years.

Uses & applications

Extensively used in construction as an aggregate, road base, or building stone; also used in glass manufacturing if silica content is high.

Geological facts

Sandstone makes up about 20% of all sedimentary rocks on Earth. Iconic landmarks like the Grand Canyon are primarily composed of various sandstone layers.

Field identification & locations

Identify in the field by its 'sandpaper' feel and visible grains. Found globally in basins and sedimentary outcroppings. Collectors look for unique banding or fossil inclusions.