sedimentary

Sandstone (Quartzose Sandstone Pebble)

Arenite (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale); Color: Tan, brown, and yellowish-grey; Luster: Dull to earthy; Crystal structure: Granular clastic; Cleavage: None; Specific gravity: 2.2–2.8

Hardness: 6-7 (Mohs scale)
Color: Tan, brown, and yellowish-grey
Luster: Dull to earthy

Identified June 2, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Tan, brown, and yellowish-grey; Luster: Dull to 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. This specific rounded shape indicates long-term transport in high-energy water environments like riverbeds or coastal zones.

Uses & applications

Used widely in construction as aggregate, in glass manufacturing if pure quartz, and as a decorative stone in landscaping.

Geological facts

Sandstone can be found in almost every geological age, from the Precambrian to the Holocene. It often preserves fossils and ripple marks from ancient environments.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible rounded grains. Large deposits are found in the American Southwest and worldwide river basins. Common for riverbed collectors.