sedimentary

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale), Color: Reddish-pink and grey, Luster: Dull/Earthy, Crystal structure: Granular/Clastic, Cleavage: None/Conchoidal fractures, Specific gravity: 2.2-2.8

Identified June 25, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale), Color: Reddish-pink and grey, Luster: Dull/Earthy, Crystal structure: Granular/Clastic, Cleavage: None/Conchoidal fractures, Specific gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments of sand size over millions of years. This specific piece appears to have an upper sedimentary layer and a lower conglomerate or man-made mixture (mortar/concrete) attached.

Uses & applications

Used widely as architectural stone, road base, abrasive material for grinding, and as a reservoir rock for oil and water.

Geological facts

Sandstone accounts for roughly 20 to 25 percent of all sedimentary rocks on Earth. The reddish hue usually indicates the presence of iron oxides like hematite or goethite.

Field identification & locations

Identify by its gritty, sandpaper-like texture and visible grains. Often found in desert environments, river basins, and ocean coastlines. This specimen looks like a fragment of building material or a paver.