sedimentary
Likely ironstone pebble
Iron-oxide-rich concretion, composed mainly of goethite and/or hematite
AI-generated identification · may be incorrectSmall, rounded, ochre-golden brown pebble with an earthy to slightly metallic sheen; hardness and specific gravity cannot be determined reliably from the image. The precise mineral composition is uncertain visually.
Identified More sedimentary →
Explore Likely ironstone pebble in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Small, rounded, ochre-golden brown pebble with an earthy to slightly metallic sheen; hardness and specific gravity cannot be determined reliably from the image. The precise mineral composition is uncertain visually.
Formation & geological history
Likely formed as iron oxides cemented sediment grains or precipitated in sediment; age and formation setting cannot be determined from appearance alone.
Uses & applications
Mostly a curiosity or pocket specimen; ironstone is also used as iron ore where deposits are sufficiently rich.
Geological facts
Iron-rich coatings can make ordinary pebbles appear golden or rusty, and surface color alone does not identify a particular mineral.
Field identification & locations
The rounded shape suggests transport or abrasion, but a closer view, streak test, and hardness test would help distinguish ironstone from other materials. Ironstone occurs in sedimentary 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