sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs (depends on cementation); Color: Tan, beige, or buff; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 Mohs (depends on cementation)
Color: Tan, beige, or buff
Luster: Dull/Earthy

Identified April 25, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs (depends on cementation); Color: Tan, beige, or buff; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments. Typically deposited in riverbeds, deserts, or marine environments over millions of years.

Uses & applications

Commonly used as a building material, in glass manufacturing (if high silica), and for artistic carvings or paving stones.

Geological facts

Sandstone makes up about 20% of all sedimentary rocks on Earth. Distinctive red sandstones (like those in the Grand Canyon) get their color from iron oxide (hematite) coatings on the grains.

Field identification & locations

Identify by its 'sandpaper' feel and visible grains. It is extremely common worldwide. Collectors look for unique shapes (like this heart/ventifact shape) or fossil inclusions.