sedimentary

Sandstone (lithic)

Lithic Wacke / Arenite

Hardness: 6-7 (Mohs); Color: Grey-green, tan, brown; Luster: Dull/Earthy; Crystal structure: Clastic (grains); Cleavage: None (breaks across grains); Specific Gravity: 2.2-2.8

Hardness: 6-7 (Mohs)
Color: Grey-green, tan, brown
Luster: Dull/Earthy

Identified June 16, 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: Grey-green, tan, brown; Luster: Dull/Earthy; Crystal structure: Clastic (grains); Cleavage: None (breaks across grains); Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized rock fragments and mineral grains. Typically found in riverbeds, deltas, or desert environments. This specimen appears weathered/rounded, suggesting transport by water.

Uses & applications

Commonly used in construction as crushed stone or road base. Finer variants are used for building stone, glass making (if high silica), and abrasive grinding tools.

Geological facts

Sandstone is one of the most common sedimentary rocks on Earth and makes up about 10-20% of the Earth's crustal sedimentary rocks. It preserves many fossils and ripple marks from ancient water bodies.

Field identification & locations

Identified by its gritty 'sandpaper' texture and visible mineral grains. It is extremely common worldwide. Look for layers (bedding) or grain sorting in larger outcrops.