sedimentary

Sandstone (with potential fossil inclusions)

Clastic sedimentary rock (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (individual grains); Color: Tan, beige, grey with dark brown inclusions; Luster: Dull/Earthy; Texture: Granular/Clastic; Porosity: High.

Hardness: 6-7 (individual grains)
Color: Tan, beige, grey with dark brown inclusions
Luster: Dull/Earthy

Identified April 6, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (individual grains); Color: Tan, beige, grey with dark brown inclusions; Luster: Dull/Earthy; Texture: Granular/Clastic; Porosity: High.

Formation & geological history

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

Uses & applications

Commonly used as a building material, in paving, and as a source of high-purity silica for glass manufacturing. If containing fossils, it serves as a paleontology specimen.

Geological facts

Sandstone accounts for roughly 20 to 25 percent of all sedimentary rocks on Earth. The dark patches in this specific specimen likely represent organic matter or small fossilized fragments.

Field identification & locations

Identify by its gritty, sand-paper-like feel. It is found globally in sedimentary basins. Collectors should look for distinct layering or fossils within the matrix.