sedimentary

Sandstone (Quartzose)

Arenite (predominantly SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale); Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Granular (sand-sized clasts); Cleavage: None; Specific gravity: 2.2-2.8.

Hardness: 6-7 (Mohs scale)
Color: Tan, beige, or light brown
Luster: Dull/Earthy

Identified March 31, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Granular (sand-sized clasts); Cleavage: None; Specific gravity: 2.2-2.8.

Formation & geological history

Formed by the accumulation and cementation of mineral particles (sand) in environments like rivers, beaches, or deserts. Often represents Phanerozoic eon deposits across various geological ages.

Uses & applications

Used widely in construction for building stone, paving, and as an aggregate. High-purity varieties are used in glass manufacturing and metal casting.

Geological facts

Sandstone makes up about 10-25% of all sedimentary rocks. It is highly porous and often serves as a significant aquifer for groundwater or a reservoir for petroleum and natural gas.

Field identification & locations

Identify in the field by its gritty texture (feels like sandpaper) and visible sand grains. Commonly found in canyon walls and riverbeds. For collectors, look for cross-bedding or ripple marks.