sedimentary

Sandstone (Quartzose Sandstone)

Arenite

AI-generated identification · may be incorrect

Hardness: 6-7 (on Mohs scale); Color: Tan, brown, or light reddish-orange; Luster: Dull/Earthy; Crystal structure: Clastic (composed of rounded mineral grains); Cleavage: None; Specific gravity: 2.2-2.8

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

Identified April 11, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the accumulation and lithification of sand-sized mineral particles or rock fragments, typically through hydraulic action in rivers, lakes, or oceans over millions of years.

Uses & applications

Used primarily in building and paving construction, as a source for glass manufacturing (if high silica), and as a common material for sharpening tools.

Geological facts

Sandstone acts as a natural aquifer and often contains oil and gas deposits due to its high porosity and permeability.

Field identification & locations

Identify in the field by its gritty texture (feels like sandpaper) and visible sand grains. Found globally in desert regions and ancient riverbeds. Collectors often look for varieties with 'picture' patterns or fossils.