sedimentary

Sandstone (Yellow/Siltstone variant)

Arenite (SiO2 primarily)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Tan, yellow, light brown; Luster: Dull/Earthy; Crystal structure: Clastic (sand grains); Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Tan, yellow, light brown
Luster: Dull/Earthy

Identified April 17, 2026More sedimentary →

Explore Sandstone (Yellow/Siltstone variant) 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, yellow, light brown; Luster: Dull/Earthy; Crystal structure: Clastic (sand grains); Cleavage: None; Specific gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation of sand-sized mineral particles or rock fragments. Over millions of years, pressure and minerals like silica or calcium carbonate cement the grains together in riverbeds, deserts, or marine environments.

Uses & applications

Predominantly used as a construction material (flagstone, pavers) and in glass manufacturing or as a filter medium. Historically used for grindstones and sculpture.

Geological facts

Sandstone accounts for roughly 20-25% of all sedimentary rocks on Earth. It is a major reservoir for water (aquifers) and oil/gas due to its porosity.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible layers or bedding planes. It is commonly found in canyon regions, cliffs, and dry riverbeds.