Sandstone
Arenite (SiO2 based)
sedimentary
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
Learn about Mineralized Fossil in the encyclopedia
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Petrified Wood
Silicified Wood (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (with Goethite/Limonite cement)
sedimentary
Geode (unopened)
Chert / Chalcedony Geode (SiO2)
sedimentary
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock)
sedimentary
Siderite Concretion in Shale
Iron carbonate (FeCO3) in Mudstone/Shale matrix
sedimentary
Sandstone (Quartzite-rich Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartzite River Rock with Dendrites
Metamorphosed Quartz-rich Sandstone with Manganese Oxide (MnO2) inclusions
metamorphic
Limestone with Fossil inclusions
Fossiliferous Limestone (CaCO3)
sedimentary
Sandstone Pebbles
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Concretion
Various mineral compositions, typically carbonate or iron oxide cemented sediment
Sedimentary
Sandstone Concretion
Sandstone (Sedimentary rock, mostly SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood / Chalcedony (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Aggregate Concrete
Anthropogenic Conglomerate (Technosol)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Quartzose)
Arenite (SiO2 principal mineral)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 inclusions)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone (Micaceous)
Arenite (composed primarily of SiO2)
sedimentary
Dendritic Agate (specifically Orange/Tumbled)
Silicon Dioxide (SiO2) with Oxide Inclusions
mineral
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary
Sandstone
Arenite (SiO2 based typically)
sedimentary
Fossiliferous Limestone
Limestone (CaCO3 - Calcium Carbonate)
sedimentary
Fossilized Gastropod (Snail)
Class Gastropoda (internal mold or 'steinkern')
sedimentary
Stromatolite
Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclastic inclusions
sedimentary
Shale or Mudstone River Pebble
Argillaceous sedimentary rock
sedimentary
Kambaba Jasper
Stromatolite Jasper (Microcrystalline Quartz with Cyanobacteria fossile)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone Concretion
Sedimentary Concretion (SiO2 or CaCO3 cemented)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 impurities)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary