sedimentary
Sandstone
Arenite (SiO2 principal)
AI-generated identification · may be incorrectHardness: 6-7 Mohs (grains), Color: Tan, brown, or yellow-orange (due to iron oxides), Luster: Dull/Earthy, Crystal Structure: Clastic (composed of cemented sand-sized grains), Cleavage: None, Specific Gravity: 2.2-2.8
Identified More sedimentary →
Explore Sandstone in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 Mohs (grains), Color: Tan, brown, or yellow-orange (due to iron oxides), Luster: Dull/Earthy, Crystal Structure: Clastic (composed of cemented sand-sized grains), 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 (lithification). Most commonly forms in river deltas, deserts, or marine environments where sand is deposited.
Uses & applications
Historically used for building construction, grindstones for sharpening tools, glass manufacturing (if high silica content), and as decorative pavers.
Geological facts
Sandstone is one of the most common sedimentary rocks. It often contains fossils and serves as a major aquifer or reservoir for petroleum and natural gas.
Field identification & locations
Identify by the gritty sand-paper feel. Found globally in canyon walls and riverbeds. For collectors, look for unique patterns like cross-bedding or fossil inclusions.
More like this
Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary