sedimentary
Sandstone Cobble with Iron Staining
Arenite with Limonite/Goethite coatings
AI-generated identification · may be incorrectHardness: 6-7 (on Mohs scale); Color: Greyish-green with yellowish-orange iron staining; Luster: Dull/Earthy; Structure: Granular/Clastic; Cleavage: None
- Hardness
- 6-7 (on Mohs scale)
- Color
- Greyish-green with yellowish-orange iron staining
- Luster
- Dull/Earthy
Identified More sedimentary →
Explore Sandstone Cobble with Iron Staining in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 (on Mohs scale); Color: Greyish-green with yellowish-orange iron staining; Luster: Dull/Earthy; Structure: Granular/Clastic; Cleavage: None
Formation & geological history
Formed from the lithification of sand-sized mineral particles or rock fragments, typically in river beds, beaches, or shallow seas. This specimen was likely smoothed by water erosion in a fluvial or coastal environment.
Uses & applications
Primarily used as aggregate in construction, landscaping, or as garden decoration due to its rounded, natural shape.
Geological facts
The orange-yellow ring on the surface is likely a 'Liesegang ring' or similar iron oxide staining caused by the weathering of iron-rich minerals during chemical weathering processes.
Field identification & locations
Identify by its grainy texture and the presence of oxidized staining. Commonly found in riverbeds, glacial tills, and shoreline deposits worldwide.
More like this
Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary