sedimentary

Sandstone (Quartzose type)

Arenite (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs scale; Color: Greyish-white to tan; Luster: Dull/Earthy; Crystal structure: Clastic (sand-sized grains); Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 Mohs scale
Color: Greyish-white to tan
Luster: Dull/Earthy

Identified February 19, 2026More sedimentary →

Explore Sandstone (Quartzose type) 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 scale; Color: Greyish-white to tan; Luster: Dull/Earthy; Crystal structure: Clastic (sand-sized grains); Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of mineral grains or rock fragments (0.0625 to 2 mm in size), typical of riverbeds, beaches, or desert environments. This specific specimen appears to be a river-worn pebble smoothened by water erosion.

Uses & applications

Commonly used as a building material, road base, or in glass manufacturing if the quartz content is high enough. Small rounded pebbles are used in landscaping and aquariums.

Geological facts

Sandstone makes up about 20-25% of all sedimentary rocks on Earth. The iconic red 'Wave' in Arizona and the city of Petra are both famous sandstone formations.

Field identification & locations

Identify in the field by its gritty 'sandpaper' texture and visible granules. Often found in riverbeds, coastal areas, and ancient sedimentary basins.