sedimentary

Sandstone (Banded)

Arenite (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale), Color: Tan, beige, and reddish-brown bands, Luster: Dull/Earthy, Crystal Structure: Granular/Clastic, Specific Gravity: 2.2-2.8

Identified July 13, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale), Color: Tan, beige, and reddish-brown bands, Luster: Dull/Earthy, Crystal Structure: Granular/Clastic, Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments over millions of years. This specimen shows distinct bedding planes (striae) caused by variations in sediment deposition.

Uses & applications

Commonly used in construction as a building material, for paving, in the manufacture of glass, or as decorative garden stones.

Geological facts

Sandstone layers can act as vast underground reservoirs for water, oil, and natural gas due to their high porosity. The red coloring in the bands is typically caused by the oxidation of iron minerals like hematite.

Field identification & locations

Identified by its gritty feel (like sandpaper) and visible layering or bedding. Often found in riverbeds, canyons, and coastal cliffs. Collectors look for unique banding patterns like those seen in 'Wonderstone'.