sedimentary

Sandstone (lithic wacke)

Arenite / Lithic Wacke (mostly SiO2 with rock fragments)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs); Color: Tan, brownish-grey; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 (Mohs)
Color: Tan, brownish-grey
Luster: Dull/Earthy

Identified April 14, 2026More sedimentary →

Explore Sandstone (lithic wacke) 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, brownish-grey; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments. This specimen appears to be a clastic sedimentary rock formed in a terrestrial or shallow marine environment during various geological ages.

Uses & applications

Commonly used in construction, as a building stone, in paving, and as an industrial abrasive. Low value for jewelry but significant in architectural history.

Geological facts

Sandstone accounts for about 10-20% of the Earth's sedimentary rocks. Many sandstone formations are excellent reservoirs for water, oil, and natural gas due to their porosity.

Field identification & locations

Identify in the field by its 'gritty' feel (like sandpaper) and visible grains. Often found in layered outcrops or riverbeds. It will not fizz with acid unless it has a calcitic cement.