sedimentary

Hematitic Sandstone

Sandstone with Iron Oxide (Hematite) staining

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Tan/light grey with reddish-brown staining; Luster: Dull or earthy; Crystal structure: Clastic (granular); Cleavage: None; Specific Gravity: 2.3-2.6

Hardness: 6-7 on Mohs scale
Color: Tan/light grey with reddish-brown staining
Luster: Dull or earthy

Identified June 26, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan/light grey with reddish-brown staining; Luster: Dull or earthy; Crystal structure: Clastic (granular); Cleavage: None; Specific Gravity: 2.3-2.6

Formation & geological history

Formed through the accumulation of sand-sized grains, primarily quartz, which are then cemented by minerals like silica or calcium carbonate. The red staining occurs as oxygenated groundwater carries dissolved iron (hematite) through the porous rock, leaving behind oxide deposits.

Uses & applications

Commonly used as a building material, paving stone, and in glass manufacturing or metal smelting depending on purity. Small specimens are collected for decorative or educational purposes.

Geological facts

The red color is chemically identical to rust. If the iron staining forms concentric rings, the specimen is often called a Liesegang stone.

Field identification & locations

Identify by its gritty, sandpaper-like texture and the distinct red-to-maroon staining that often follows bedding planes or pore spaces. Frequently found in riverbeds, deserts, and coastal areas.