sedimentary

Sandstone (Calcareous/Lithic)

Sedimentary Rock (Clastic Sandstone with Calcium Carbonate cement)

AI-generated identification · may be incorrect

Hardness: 6-7 (individual quartz grains), 3-4 (cement); Color: Tan, beige, grey; Luster: Dull/Earthy; Structure: Clastic, granular; Cleavage: None

Hardness: 6-7 (individual quartz grains), 3-4 (cement)
Color: Tan, beige, grey
Luster: Dull/Earthy

Identified July 19, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (individual quartz grains), 3-4 (cement); Color: Tan, beige, grey; Luster: Dull/Earthy; Structure: Clastic, granular; Cleavage: None

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments (clasts) at the Earth's surface and within bodies of water over millions of years.

Uses & applications

Commonly used as a building material, road base, or aggregate. Historically significant for sculptural use and grindstones.

Geological facts

Sandstone preserves a history of the Earth's surface conditions, including prehistoric river beds and ancient desert dunes. It often contains fossils.

Field identification & locations

Identify by its gritty, sandpaper-like feel and visible grains. Test with diluted acid (like vinegar); if it fizzes, it contains calcite cement. Found in almost any sedimentary basin.