Sandstone (Quartzose Sandstone)

Physical Properties

Hardness: 6-7 on Mohs scale; Color: Tan, beige, or light grey; Luster: Dull/Earthy; Crystal structure: Clastic/Granular; Cleavage: None; Specific gravity: approx 2.0-2.6

Formation & Geological History

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments. Occurs in diverse environments like deserts, riverbeds, and beaches over millions of years.

Uses & Applications

Commonly used in construction as a building material, paving, and decorative garden stone. Certain types are used as abrasive materials in industrial processes.

Geological Facts

Sandstone records the history of Earth's landscape; the cross-bedding within sandstone layers can reveal ancient wind and water current patterns.

Field Identification & Locations

Identify by its gritty texture (feels like sandpaper) and visible grains. Often found in riverbeds or as rounded cobbles in landscaping. Look for layered structures in larger outcroppings.

Identified on: 4/19/2026

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