sedimentary

Laterite

Ferrallitic soil or rock crust

AI-generated identification · may be incorrect

Hardness varies from 3 to 7 depending on iron and aluminum content; reddish-brown to yellowish-brown color; earthy to dull luster; amorphous or porous crystal structure with poor cleavage.

Identified October 17, 2026More sedimentary →

Explore Laterite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness varies from 3 to 7 depending on iron and aluminum content; reddish-brown to yellowish-brown color; earthy to dull luster; amorphous or porous crystal structure with poor cleavage.

Formation & geological history

Formed through intense and prolonged weathering of underlying parent rock in hot, wet tropical and subtropical climates, leaching soluble minerals and leaving iron and aluminum oxides.

Uses & applications

Used locally as a low-grade iron ore and historically cut into blocks for primitive building construction, commonly known as laterite bricks.

Geological facts

Laterite crusts harden significantly upon exposure to air, making them durable for construction once mined. The provided coordinates fall within Minas Gerais, Brazil, a region famous for rich iron ore deposits and weathered lateritic profiles.

Field identification & locations

Identified by its distinctive vesicular or porous texture, reddish-brown color, and heavy iron content. Common in tropical shields and cratons globally.