sedimentary

Sandstone

Clastic Sedimentary Rock (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale); Color: tan, yellow, or light brown; Luster: dull/earthy; Crystal structure: granular/clastic; Cleavage: none; Specific gravity: 2.2-2.8

Hardness: 6-7 (Mohs scale)
Color: tan, yellow, or light brown
Luster: dull/earthy

Identified April 10, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: tan, yellow, or light brown; Luster: dull/earthy; Crystal structure: granular/clastic; Cleavage: none; Specific gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments (clasts) the size of sand. These particles are typically deposited by water, wind, or ice in environments like deserts, riverbeds, and shorelines.

Uses & applications

Commonly used as a building material, in decorative masonry, as a reservoir for oil and natural gas, and as a source of glass/silica sand in industry.

Geological facts

Sandstone makes up approximately 20% of all sedimentary rocks on Earth. Famous landmarks like the Grand Canyon and the Treasury at Petra are carved from or composed of massive sandstone layers.

Field identification & locations

Identify by its gritty, sandpaper-like texture and visible sand grains. It react with acids only if there is a calcitic cement. Found globally in basins and mountainous regions where erosion occurs.