sedimentary

Sandstone (with Laminations)

Clastic sedimentary rock (primarily Quartz-based)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Tan, beige, or grey with visible darker horizontal bands; Luster: Dull/Earthy; Texture: Gritty, medium-grained; Structure: Parallel lamination/stratification.

Hardness: 6-7 on Mohs scale
Color: Tan, beige, or grey with visible darker horizontal bands
Luster: Dull/Earthy

Identified July 12, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, beige, or grey with visible darker horizontal bands; Luster: Dull/Earthy; Texture: Gritty, medium-grained; Structure: Parallel lamination/stratification.

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral particles or rock fragments, typically in riverbeds, deserts, or coastal environments. This specimen shows distinct layering reflecting changes in energy or sediment supply during deposition.

Uses & applications

Used widely as a building and paving material (flagstone), in high-quality glass manufacturing, and as a reservoir rock for groundwater and petroleum.

Geological facts

The visible lines are called laminations; they are essentially a record of ancient environmental conditions. If the layers were thicker than 1cm, they would be called beds.

Field identification & locations

Identify by its 'sandpaper' feel and visible horizontal layering. It is found in vast sedimentary basins globally. Collectors look for unique banding patterns or fossils preserved between layers.