sedimentary

Sandstone (Quartzose)

Clastic sedimentary rock (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs); Color: Tan, yellowish-brown, cream; Luster: Dull to earthy; Texture: Granular/clastic; Cleavage: None; Structure: Massive or bedded.

Hardness: 6-7 (Mohs)
Color: Tan, yellowish-brown, cream
Luster: Dull to earthy

Identified July 15, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs); Color: Tan, yellowish-brown, cream; Luster: Dull to earthy; Texture: Granular/clastic; Cleavage: None; Structure: Massive or bedded.

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral grains, mostly quartz. Typically deposited in river, desert, or marine environments over millions of years through lithification.

Uses & applications

Commonly used in construction, paving, landscaping, and as a raw material for glass manufacturing. In art and history, it has been used for carving and monuments.

Geological facts

Sandstone can be highly porous and often acts as a significant aquifer for groundwater or a reservoir for oil and natural gas. Some sandstones preserve spectacular ripple marks from ancient waters.

Field identification & locations

Identify in the field by its gritty 'sandpaper' feel and visible grains. It is extremely common worldwide in sedimentary basins. Collectors often look for colorful banding or iron staining (Liesegang rings).