Sandstone (Quartzose Sandstone)

Physical Properties

Hardness: 6-7 (Mohs); Color: Tan, beige, grey; Luster: Dull/Earthy; Crystal structure: Granular (clastic); Cleavage: None; Specific gravity: 2.2-2.8

Formation & Geological History

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments. These typically form in river beds, beaches, or deserts and undergo lithification over millions of years.

Uses & Applications

Used widely in construction (building stone, concrete aggregate), glass manufacturing (if high silica), and as a common landscaping material.

Geological Facts

Sandstone is one of the most common sedimentary rocks on Earth. It often preserves fossils and serves as a primary reservoir for ground water and petroleum because of its porosity.

Field Identification & Locations

Identify by its 'sandpaper' feel and visible grains. Often found in riverbeds or coastal regions. Look for bedding planes or layering in larger outcrops.

Identified on: 4/14/2026

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