sedimentary

Sandstone (Banded)

Clastic sedimentary rock (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (depending on cementation); Color: Tan, brown, and cream bands; Luster: Dull to earthy; Texture: Granular/clastic; Structure: Stratified layering/bedding.

Hardness: 6-7 (depending on cementation)
Color: Tan, brown, and cream bands
Luster: Dull to earthy

Identified June 13, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (depending on cementation); Color: Tan, brown, and cream bands; Luster: Dull to earthy; Texture: Granular/clastic; Structure: Stratified layering/bedding.

Formation & geological history

Formed from the lithification of sand-sized mineral grains or rock fragments. The visible bands represent different layers of sediment deposited over time in environments like riverbeds, deserts, or marine shorelines. The age varies by deposit location but can range from millions to hundreds of millions of years old.

Uses & applications

Commonly used as a building material, paving stone, and in glass manufacturing (if high silica). Frequently used as decorative garden stones or for geological education.

Geological facts

Sandstone accounts for roughly 20-25% of all sedimentary rocks on Earth. The distinct banding seen in this specimen is often caused by variations in mineral content or grain size during deposition.

Field identification & locations

Identify in the field by its gritty 'sandpaper' feel and visible layers or bedding planes. It is commonly found in canyons, river valleys, and coastal bluffs. For collectors, look for high-contrast banding or unique shapes created by water erosion (like this 'flying saucer' or cobble shape).