sedimentary

Sandstone (Feldspathic / Arkose)

Sandstone (SiO2 with variable mineral grains)

AI-generated identification · may be incorrect

Hardness: 6-7 on the Mohs scale depending on cementation; Color: Yellow-tan to light brown; Luster: Earthy, dull, or sugary; Grain size: Medium (sand-sized grains); Texture: Clastic, rough to the touch like sandpaper.

Hardness: 6-7 on the Mohs scale depending on cementation
Color: Yellow-tan to light brown
Luster: Earthy, dull, or sugary

Identified July 26, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the accumulation, compaction, and cementation of sand-sized mineral and rock grains (predominantly quartz and feldspar). Typically deposited in shallow marine, desert dune, river, or beach environments over millions of years.

Uses & applications

Widely used as a building and paving material, in dimension stone construction, aggregate for concrete, and historically for grindstones and carved monuments.

Geological facts

Sandstone makes up about 10-20% of all sedimentary rocks on Earth. The natural pores within sandstone often serve as major reservoirs for groundwater and petroleum.

Field identification & locations

Identified in the field by its distinctive gritty feel, visible sand-sized grains, and buff-to-yellowish color. It is commonly found exposed in canyon walls, cliffs, and quarries worldwide.