sedimentary

Sandstone

Arenite (SiO2 based)

Hardness: 6-7 Mohs; Color: Tan, beige, grey; Luster: Dull/Earthy; Crystal Structure: Clastic; Cleavage: None; Specific Gravity: 2.2-2.8.

Hardness: 6-7 Mohs
Color: Tan, beige, grey
Luster: Dull/Earthy

Identified May 31, 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, beige, grey; Luster: Dull/Earthy; Crystal Structure: Clastic; Cleavage: None; Specific Gravity: 2.2-2.8.

Formation & geological history

Formed by the cementation of sand-sized mineral particles or rock fragments. These are typically deposited in river beds, oceans, or deserts over millions of years. This specimen appears to be a common clastic variety.

Uses & applications

Extensively used in construction, road building, as a primary material for glass manufacturing (if high silica), and as a popular choice for stone carvings and garden features.

Geological facts

Sandstone represents about 20% of all sedimentary rocks on Earth. Famous landmarks like the Grand Canyon or the Treasury at Petra are formed primarily from sandstone layers.

Field identification & locations

Identify by its gritty, sandpaper-like feel and visible grain structure. Commonly found in sedimentary basins and coastal areas worldwide. Collectors look for unique color banding or fossil inclusions.