sedimentary

Sandstone

Arenite (primarily composed of SiO2)

Hardness: 6-7 Mohs; Color: Tan, yellow, brown with distinct layered banding; Luster: Dull/Earthy; Crystal Structure: Clastic (granular); Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Tan, yellow, brown with distinct layered banding
Luster: Dull/Earthy

Identified June 6, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, yellow, brown with distinct layered banding; Luster: Dull/Earthy; Crystal Structure: Clastic (granular); 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, often in desert, river, or coastal environments. This specimen shows distinct bedding planes (stratification).

Uses & applications

Commonly used in construction, housebuilding, glass manufacturing, and as decorative garden stones.

Geological facts

Sandstone makes up about 20% of all sedimentary rocks on Earth. The layers seen in this specimen represent different periods of sediment deposition.

Field identification & locations

Identify in the field by its gritty texture (feels like sandpaper) and visible layering or bedding planes. Frequently found in canyons, riverbeds, and coastal regions.