sedimentary

Banded Sandstone

Arenite with Liesegang banding (primarily SiO2 with FeO(OH) impurities)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Tan, beige, and reddish-brown bands; Luster: Dull to earthy; Crystal structure: Granular (clastic); Cleavage: None; Specific gravity: 2.2-2.8.

Hardness: 6-7 on Mohs scale
Color: Tan, beige, and reddish-brown bands
Luster: Dull to earthy

Identified March 22, 2026More sedimentary →

Explore Banded Sandstone in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, beige, and reddish-brown bands; Luster: Dull to earthy; Crystal structure: Granular (clastic); Cleavage: None; Specific gravity: 2.2-2.8.

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments. The distinct stripes (Liesegang rings) are caused by the rhythmic precipitation of iron oxides within the porous rock over millions of years through groundwater movement.

Uses & applications

Used primarily in landscaping, decorative stone masonry, and construction. In polished forms, it is used for coasters, bookends, or as paperweights for hobbyists.

Geological facts

The banding often mimics the look of wood grain or desert landscapes. These specimens are frequently found in arid environments where groundwater chemistry has fluctuated significantly over geological time.

Field identification & locations

Identify by its gritty, sandpaper-like texture and visible layers of different colors. It is commonly found in riverbeds, canyons, and sedimentary basins. It will not fizz with acid unless the cement is calcitic.