Rock Identifier

Category

Igneous And Fossil

Browse igneous and fossil specimens identified by the Rock Identifier community.

Learn about Igneous And Fossil in the encyclopedia

Fossil Opal

Bone Opal

Turritella Jasper

Amber

Fossiliferous Limestone

Fossiliferous Limestone

Turritella Agate

Turritella Agate

Petrified Wood

Carbonatite

Diatomite

Guano

Jet

Diatomaceous Earth

Amber (Succinite (Fossilized Resin)) — mineral

Amber

Succinite (Fossilized Resin)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Arenite (Clastic Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Clastic Sedimentary Rock)

Chert (and Fossiliferous Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (and Fossiliferous Chert)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Petrified Wood (Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

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

Sandstone (Quartzose Sandstone)

Arenite (SiO2)

Shale (Fissile Mudstone (primarily composed of clay minerals and quartz grains)) — sedimentary

Shale

Fissile Mudstone (primarily composed of clay minerals and quartz grains)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2 - Silicon Dioxide)) — mineral

Petrified Wood

Silicified Wood (SiO2 - Silicon Dioxide)

Fossiliferous Limestone (Crinoidal) (Bioclastic Limestone (predominantly CaCO3)) — sedimentary

Fossiliferous Limestone (Crinoidal)

Bioclastic Limestone (predominantly CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (Lithic Sandstone)

Petrified Wood (Silicified wood (primarily Silicon Dioxide, SiO2)) — sedimentary

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Echinoid Fossil (Sea Urchin) (Echinoidea (specifically likely Schizaster or similar genus), calcium carbonate (CaCO3)) — sedimentary

Echinoid Fossil (Sea Urchin)

Echinoidea (specifically likely Schizaster or similar genus), calcium carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone or Mudstone with Iron Staining (Ferruginous Sandstone/Mudstone) — Sedimentary

Sandstone or Mudstone with Iron Staining

Ferruginous Sandstone/Mudstone

Limonite Concretion (Goethite-Limonite (FeO(OH)·nH2O)) — sedimentary

Limonite Concretion

Goethite-Limonite (FeO(OH)·nH2O)

Belemnite (Fossilized Rostrum) (Belemnitida (Order), composed of Calcite (CaCO3)) — sedimentary

Belemnite (Fossilized Rostrum)

Belemnitida (Order), composed of Calcite (CaCO3)

Fossiliferous Limestone (Carbonate sedimentary rock with trace fossils (CaCO3)) — sedimentary

Fossiliferous Limestone

Carbonate sedimentary rock with trace fossils (CaCO3)

Ironstone Concretion (Ferruginous Concretion (Fe2O3·nH2O)) — sedimentary

Ironstone Concretion

Ferruginous Concretion (Fe2O3·nH2O)

Botryoidal Chalcedony (Quartz Var.) (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony (Quartz Var.)

Silicon Dioxide (SiO2)

Ironstone Concretion (Limonite/Goethite) (Ironstone (composed primarily of Goethite FeO(OH) and Limonite)) — sedimentary

Ironstone Concretion (Limonite/Goethite)

Ironstone (composed primarily of Goethite FeO(OH) and Limonite)

Sandstone Concretion (Clastic sedimentary rock (primarily Quartz SiO2)) — sedimentary

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Shale or Mudstone (Argillaceous sedimentary rock) — sedimentary

Shale or Mudstone

Argillaceous sedimentary rock

Crushed Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Crushed Limestone

Sedimentary Calcium Carbonate (CaCO3)

Red Shale (Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)) — sedimentary

Red Shale

Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous) (Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

Chert (White/Gray variety) (Chert (SiO2)) — sedimentary

Chert (White/Gray variety)

Chert (SiO2)

Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Nodule) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Nodule)

Microcrystalline Silica (SiO2)

Chert (specifically a flint nodule component) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically a flint nodule component)

Microcrystalline quartz (SiO2)

Sandstone (Quartz-rich Pebble) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartz-rich Pebble)

Arenite (primarily SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Bituminous Coal (Organic sedimentary rock (humic coal)) — sedimentary

Bituminous Coal

Organic sedimentary rock (humic coal)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Sandstone with trace fossil (Sandstone, possibly with Skolithos or similar trace fossil) — sedimentary

Sandstone with trace fossil

Sandstone, possibly with Skolithos or similar trace fossil

Shale (Shale (Fine-grained clastic sedimentary rock)) — sedimentary

Shale

Shale (Fine-grained clastic sedimentary rock)

Ferruginous Sandstone (Ferruginous Quartz-Arenite) — sedimentary

Ferruginous Sandstone

Ferruginous Quartz-Arenite

Sandstone (Quartzite-rich) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)