sedimentary

Sandstone

Arenite (SiO2 principal composition)

Hardness: 6-7 Mohs; Color: Tan, beige, or light brown with banding; Luster: Dull/Earthy; Structure: Clastic; Cleavage: None; Specific Gravity: 2.2-2.8.

Hardness: 6-7 Mohs
Color: Tan, beige, or light brown with banding
Luster: Dull/Earthy

Identified June 8, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, beige, or light brown with banding; Luster: Dull/Earthy; Structure: Clastic; Cleavage: None; Specific Gravity: 2.2-2.8.

Formation & geological history

Formed over millions of years by the accumulation and cementation of sand-sized mineral grains, typically quartz and feldspar, in environments like beaches, deserts, or river beds.

Uses & applications

Commonly used in construction as a building material, for paving stones, and in the production of glass and industrial abrasives.

Geological facts

Sandstone records historical environmental changes through its layers; the visible bands in this specimen indicate different periods of sediment deposition.

Field identification & locations

Identify by its gritty, abrasive feel and visible layers or grains. Common on coastlines and in arid regions. Collectors should look for unique cross-bedding or fossil inclusions.