Rock Identifier

Category

Organic Specimen (Fossil)

Browse organic specimen (fossil) specimens identified by the Rock Identifier community.

Learn about Organic Specimen (Fossil) in the encyclopedia

Petrified Wood

Amber

Jet

Opalized Wood

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartz Pebble (with Manganese dendrites/staining) (Silicon Dioxide (SiO2) with Manganese Oxide impurities) — mineral

Quartz Pebble (with Manganese dendrites/staining)

Silicon Dioxide (SiO2) with Manganese Oxide impurities

Burmese Amber (Burmite) (Burmite (C10H16O)) — mineraloid

Burmese Amber (Burmite)

Burmite (C10H16O)

Sandstone (likely Graywacke or Arkose) (Arenite) — sedimentary

Sandstone (likely Graywacke or Arkose)

Arenite

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (likely Graywacke or Lithic Sandstone) (Clastic Sedimentary Rock) — sedimentary

Sandstone (likely Graywacke or Lithic Sandstone)

Clastic Sedimentary Rock

Sandstone (likely with Borings or Vesicular Basalt) (Clastic Sedimentary Rock (Sandstone)) — sedimentary

Sandstone (likely with Borings or Vesicular Basalt)

Clastic Sedimentary Rock (Sandstone)

Sandstone (Quartzose) (Arenite (SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (SiO2)

Sandstone (likely Quartzose Sandstone) (Arenite (primarily SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Water-worn Pebble) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Water-worn Pebble)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Sandstone (clastic sedimentary rock)) — sedimentary

Sandstone

Sandstone (clastic sedimentary rock)

Brachiopod Fossil (Phylum Brachiopoda) — fossil

Brachiopod Fossil

Phylum Brachiopoda

Slate (Foliated low-grade metamorphic rock) — metamorphic

Slate

Foliated low-grade metamorphic rock

Pitted Limestone with Honeycomb Weathering (Karst-weathered fossiliferous limestone (CaCO3)) — sedimentary

Pitted Limestone with Honeycomb Weathering

Karst-weathered fossiliferous limestone (CaCO3)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Sandstone (Ferruginous) (Arenite (SiO2 with Iron Oxide impurities)) — sedimentary

Sandstone (Ferruginous)

Arenite (SiO2 with Iron Oxide impurities)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Fossilized Coral (Rugosa / Tabulata coral fossils replaced by silica (Chalcedony/Quartz)) — fossil

Fossilized Coral

Rugosa / Tabulata coral fossils replaced by silica (Chalcedony/Quartz)

Limestone with Calcite Crust (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Calcite Crust

Sedimentary Calcium Carbonate (CaCO3)

Sandstone with Liesegang Rings (Quartzose Sandstone with Iron Oxide Precipitation) — sedimentary

Sandstone with Liesegang Rings

Quartzose Sandstone with Iron Oxide Precipitation

Red Sandstone (Arenite (primarily SiO2 with hematite/iron oxide coating)) — sedimentary

Red Sandstone

Arenite (primarily SiO2 with hematite/iron oxide coating)

Sandstone (Quartzite-rich) (Clastic sedimentary rock (SiO2 primarily)) — sedimentary

Sandstone (Quartzite-rich)

Clastic sedimentary rock (SiO2 primarily)

Sandstone (Ferruginous) (Arenite with Iron-oxide inclusions (SiO2 primarily)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron-oxide inclusions (SiO2 primarily)

Sandstone (Arenite (primarily SiO2 - Silicon Dioxide)) — sedimentary

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

Ammonite Fossil (Ammonoidea (Calcium carbonate or Pyrite replacement)) — sedimentary

Ammonite Fossil

Ammonoidea (Calcium carbonate or Pyrite replacement)

Belemnite Fossil (Belemnitida (Order within Cephalopoda)) — sedimentary

Belemnite Fossil

Belemnitida (Order within Cephalopoda)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (likely Quartzose Sandstone) (Arenite (primarily SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

Silty Shale (Silty Shale (Fissile Sedimentary Rock)) — sedimentary

Silty Shale

Silty Shale (Fissile Sedimentary Rock)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Fossiliferous Limestone (Murchisonia/Gastropod Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Murchisonia/Gastropod Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Limestone (Beach Pebble) (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Beach Pebble)

Sedimentary Calcium Carbonate (CaCO3)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Weathered brown stone, likely basalt or iron-stained volcanic rock (Indeterminate; possibly vesicular basalt (mafic silicate rock)) — igneous

Weathered brown stone, likely basalt or iron-stained volcanic rock

Indeterminate; possibly vesicular basalt (mafic silicate rock)

Sandstone (Ferruginous) (Arenite with Iron-Oxide cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron-Oxide cement

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Coal (Anthracite or Bituminous) (Carbon (C) with varying hydrocarbon and mineral impurities) — sedimentary

Coal (Anthracite or Bituminous)

Carbon (C) with varying hydrocarbon and mineral impurities

Dendritic Siltstone (Siltstone with Manganese Oxide dendrites (MnO2)) — sedimentary

Dendritic Siltstone

Siltstone with Manganese Oxide dendrites (MnO2)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone (Sandstone (Quartz-rich sedimentary rock)) — sedimentary

Sandstone

Sandstone (Quartz-rich sedimentary rock)