sedimentary

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)

AI-generated identification · may be incorrect

Hardness 6-7 (Mohs), tan to reddish-brown color, dull/earthy luster, granular texture, no cleavage, specific gravity 2.2-2.8

Identified May 17, 2026More sedimentary →

Explore Sandstone (with Iron Staining) 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 (Mohs), tan to reddish-brown color, dull/earthy luster, granular texture, no cleavage, specific gravity 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments. Typically deposited in desert, river, or coastal environments during various geological eras.

Uses & applications

Commonly used as a building material, for paving, in the manufacture of glass (if high quartz purity), and as an aquifer for groundwater and petroleum.

Geological facts

Sandstone represents about 20% of all sedimentary rocks on Earth. The red hues are typically due to iron oxide (hematite) coating the sand grains.

Field identification & locations

Identified by its 'sandpaper' feel and visible grains. Often found in layered formations or canyon walls. Collectors look for unique banding patterns (Wonderstone) or fossils.