sedimentary

Sandstone Pebble

Arenite (Clastic Sedimentary Rock)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Gray, tan, or light green; Luster: Dull/Earthy; Texture: Granular like sandpaper; Composition: Predominantly quartz grains with mica and feldspar inclusions.

Hardness: 6-7 on Mohs scale
Color: Gray, tan, or light green
Luster: Dull/Earthy

Identified July 2, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Gray, tan, or light green; Luster: Dull/Earthy; Texture: Granular like sandpaper; Composition: Predominantly quartz grains with mica and feldspar inclusions.

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments over millions of years. This specimen shows significant rounding, indicating it was transported and eroded by water in a river or coastal environment.

Uses & applications

Primarily used as construction aggregate, road base, or in landscaping. High-quality sandstone is used for building stone and grindstones.

Geological facts

Sandstone can preserve fossil footprints and ripple marks from ancient environments. It is a highly porous rock, often acting as an important aquifer for groundwater or a reservoir for petroleum.

Field identification & locations

Identify in the field by its gritty texture and visible sand grains. It is very common in riverbeds, beaches, and desert outcrops globally. Collectors look for unique banding or fossil inclusions.