sedimentary

Sandstone (lithic wacke/conglomerate mix)

Clastic Sedimentary Rock (SiO2 with lithic fragments)

AI-generated identification · may be incorrect

Hardness: 6-7 (individual grains); Color: Tan, brown, and grey; Luster: Dull/Earthy; Structure: Clastic with visible grains and small rounded pebbles; Cleavage: None.

Hardness: 6-7 (individual grains)
Color: Tan, brown, and grey
Luster: Dull/Earthy

Identified May 30, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (individual grains); Color: Tan, brown, and grey; Luster: Dull/Earthy; Structure: Clastic with visible grains and small rounded pebbles; Cleavage: None.

Formation & geological history

Formed by the accumulation and cementation of sand-sized mineral grains or rock fragments in environments like riverbeds, deltas, or beaches over millions of years.

Uses & applications

Commonly used in construction for road base, building stone, and as a decorative landscaping material.

Geological facts

Sandstone makes up about 20% of all sedimentary rocks on Earth. It is a major reservoir for groundwater and petroleum products due to its porosity.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible grains. Often found in areas with ancient sedimentary basins or near modern waterways.