Sandstone
Arenite (primarily SiO2)
sedimentary
Category
Sedimentary (Anthropogenic)
Browse sedimentary (anthropogenic) specimens identified by the Rock Identifier community.
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Quartz Geode
Silicon Dioxide (SiO2) within Sedimentary or Igneous host
mineral
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Limonite (Ironstone Concretion)
Limonite (FeO(OH)·nH2O)
mineral
Banded Iron Formation
Banded Iron Formation (BIF)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartzwacke / Impure Sandstone
Arenite with minor lithic fragments (Silicon Dioxide matrix)
sedimentary
Quartz Geode in Sedimentary Matrix
Silicon Dioxide (SiO2) within a limestone/dolostone host
mineral
White Chalcedony
Silicon Dioxide (SiO2)
mineral
Chert / Flint Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Echinoid Fossil / Fossilized Sea Urchin
Echinoidea
fossil
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Seashell (Cone Snail Shell)
Conus sp. (Calcium Carbonate, CaCO3)
fossil
Fossilized Brachiopod or Gastropod in Chert/Limestone
Phylum Brachiopoda / Mollusca
fossil
Fossil Shell
Brachiopod or Mollusk fossil
fossil
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Fossil Coral
Rugosa or Tabulata coral fossil
fossil
Sandstone
Sandstone (SiO2 rich)
sedimentary
Quartzite River Cobble
Quartzite (primarily SiO2)
metamorphic
Chert (Yellow Jasper/Flint)
Silicon Dioxide (SiO2)
sedimentary
Banded Chert (Iron-stained)
Microcrystalline Quartz (SiO2) with Iron Oxides
sedimentary
Fossil Bone Fragment
Petrified bone (permineralized hydroxyapatite)
fossil
Sandstone (Banded)
Arenite with Iron Oxide Banding
sedimentary
Ironstone Concretion
Ferruginous Concretion (Fe2O3·nH2O)
sedimentary
Chert (Brecciated or Veined)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Red Siltstone
Siltstone (composed of Quartz and Clay minerals)
sedimentary
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Iron-stained)
Silicon Dioxide (SiO2) with Iron Oxides
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Red Sandstone
Arenite (SiO2 based with Fe2O3)
sedimentary
Glauconitic Sandstone
Glauconitic Sandstone (Greensand)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary