sedimentary

Sandstone (Pebble)

Arenite (primarily SiO2)

Hardness: 6-7 Mohs; Color: Tan/Grey/Light Brown; Luster: Dull; Crystal Structure: Clastic grain texture; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Tan/Grey/Light Brown
Luster: Dull

Identified May 21, 2026More sedimentary →

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/Grey/Light Brown; Luster: Dull; Crystal Structure: Clastic grain texture; 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 over millions of years, typically in river beds, beaches, or deserts.

Uses & applications

Used in construction, glass making, and as decorative garden stone; common for geological study and as a basic filter medium.

Geological facts

Sandstone accounts for about 20% of all sedimentary rocks on Earth. The grains are often held together by silica, calcium carbonate, or iron oxide cement.

Field identification & locations

Identify by its gritty, sandpaper-like feel and the visibility of tiny sand grains. Commonly found in riverbeds, coastal areas, and ancient sedimentary basins.