sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Hardness: 6-7 on Mohs scale; Color: Tan, beige, light gray; Luster: Dull/Earthy; Crystal Structure: Clastic (granular texture); Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 on Mohs scale
Color: Tan, beige, light gray
Luster: Dull/Earthy

Identified June 29, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, beige, light gray; Luster: Dull/Earthy; Crystal Structure: Clastic (granular texture); Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments (detritus), usually quartz or feldspar, over millions of years in environments like riverbeds, deserts, or shorelines.

Uses & applications

Commonly used as a building material, in the manufacture of glass, as a reservoir for oil and water, and as a decorative stone in landscaping.

Geological facts

Sandstone makes up about 20% of all sedimentary rocks on Earth. It is many-layered and frequently contains fossils of prehistoric life trapped within its strata.

Field identification & locations

Identify by its gritty, sandpaper-like feel and visible grains of sand. In the field, look for distinct bedding layers. It is found globally in sedimentary basins.