sedimentary

Sandstone (Banded)

Arenite (primarily SiO2)

Hardness: 6-7 Mohs; Color: Tan, cream, or beige with brown bands; Luster: Dull to earthy; Texture: Granular and gritty; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Tan, cream, or beige with brown bands
Luster: Dull to earthy

Identified June 18, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, cream, or beige with brown bands; Luster: Dull to earthy; Texture: Granular and gritty; 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 specimens are often water-worn river stones where iron oxide staining creates the distinct banding patterns.

Uses & applications

Commonly used in landscaping, as abrasive material, or as decorative river stones. Larger deposits are used in construction and tile manufacturing.

Geological facts

Sandstone constitutes about 20% of all sedimentary rocks on Earth. The rhythmic banding patterns seen here are often caused by rhythmic precipitation of minerals, specifically iron oxides, from groundwater.

Field identification & locations

Identify by its 'sandpaper' feel and visible grains. Often found in riverbeds, beaches, and desert environments. It will not fizz with acid unless it has a calcitic cement.