sedimentary

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Tan/Beige/Gray; Luster: Dull/Earthy; Texture: Granular/Sand-like; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Tan/Beige/Gray
Luster: Dull/Earthy

Identified July 18, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan/Beige/Gray; Luster: Dull/Earthy; Texture: Granular/Sand-like; Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral particles or rock fragments, typically through water or wind action in river beds, beaches, or deserts over millions of years.

Uses & applications

Used in construction, glass manufacturing, decorative paving, and as an abrasive material.

Geological facts

Sandstone accounts for about 20% of all sedimentary rocks on Earth. It is an excellent aquifer for storing groundwater and natural gas due to its porosity.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible sand grains. Commonly found in riverbeds, cliffs, and coastal regions. Collectors often value pieces with interesting bedding planes or weathering patterns.