sedimentary

Sandstone (Ferruginous)

Arenite (with Hematite/Limonite cement)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs); Color: Tan, reddish-brown, or orange due to iron oxide; Luster: Dull/Earthy; Crystal structure: Clastic (sand grains); Cleavage: None; Specific Gravity: 2.2–2.8

Hardness: 6-7 (Mohs)
Color: Tan, reddish-brown, or orange due to iron oxide
Luster: Dull/Earthy

Identified April 25, 2026More sedimentary →

Explore Sandstone (Ferruginous) 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); Color: Tan, reddish-brown, or orange due to iron oxide; Luster: Dull/Earthy; Crystal structure: Clastic (sand grains); Cleavage: None; Specific Gravity: 2.2–2.8

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments (0.0625 to 2 mm size) in river, lake, or ocean environments. This specimen likely formed in an oxidizing environment where iron-rich water cemented the grains together.

Uses & applications

Used primarily as a construction material, as a component for glass manufacturing (if high silica), in architectural stone facades, and as a decorative garden stone or abrasive.

Geological facts

Sandstone represents about 20% of all sedimentary rocks on Earth. Its porosity makes it a critical reservoir for water (aquifers) and oil/natural gas.

Field identification & locations

Identify in the field by its gritty texture (feels like sandpaper) and distinct layers or bedding planes. It is commonly found in desert environments, plateaus, and near coastal areas.