sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz - SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (individual grains); Color: Tan, beige, or grey with iron-oxide (rust) staining; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2–2.8

Hardness: 6-7 (individual grains)
Color: Tan, beige, or grey with iron-oxide (rust) staining
Luster: Dull/Earthy

Identified February 28, 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 (individual grains); Color: Tan, beige, or grey with iron-oxide (rust) staining; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2–2.8

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral particles or rock fragments. Usually deposited in riverbeds, deserts, or coastal environments over millions of years (typically Paleozoic to Cenozoic eras).

Uses & applications

Major construction material for buildings, road base, and dimension stone. Sometimes used in glass making if the quartz purity is high enough. Primarily a common landscape or decorative stone in this specific raw form.

Geological facts

Sandstone is often porous enough to act as a 'reservoir' for ground water, oil, and natural gas. It is one of the most common sedimentary rocks on Earth's crust.

Field identification & locations

Identify in the field by its 'gritty' feel (like sandpaper) and visible layering or bedding planes. Common worldwide, especially in arid basins or ancient riverbeds. Look for quartz grains reflecting light.