Rock Identifier

Category

Fossil

Browse fossil specimens identified by the Rock Identifier community.

Learn about Fossil in the encyclopedia

Fossil Opal

Fossil Opal

Amber

Amber

Bone Opal

Bone Opal

Turritella Jasper

Turritella Jasper

Fossiliferous Limestone

Fossiliferous Limestone

Turritella Agate

Turritella Agate

Petrified Wood

Petrified Wood

Diatomite

Diatomite

Guano

Guano

Jet

Jet

Diatomaceous Earth

Diatomaceous Earth

Opalized Wood

Opalized Wood

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcite-rich Sedimentary Rock (CaCO3)) — sedimentary

Limestone

Calcite-rich Sedimentary Rock (CaCO3)

Amber (Succinite (Organic Mineraloid) - C10H16O) — mineral

Amber

Succinite (Organic Mineraloid) - C10H16O

Amber (Succinite (C10H16O)) — mineraloid

Amber

Succinite (C10H16O)

Coal (most likely Bituminous or Anthracite) (Coal (primarily composed of carbon with varying amounts of other elements)) — Sedimentary rock

Coal (most likely Bituminous or Anthracite)

Coal (primarily composed of carbon with varying amounts of other elements)

Sedimentary rock

Dendritic Quartz (Silicon Dioxide (SiO2) with Manganese Oxide inclusions) — mineral

Dendritic Quartz

Silicon Dioxide (SiO2) with Manganese Oxide inclusions

Concretion with Geode Cavity (Ferruginous Sandstone Concretion with Quartz Center) — sedimentary

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

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

Sandstone (River Stone)

Arenite (composed primarily of SiO2)

Limestone (River Pebble) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (River Pebble)

Calcium Carbonate (CaCO3)

Calligraphy Stone (Fossiliferous Limestone (containing Hematite and Shells)) — sedimentary

Calligraphy Stone

Fossiliferous Limestone (containing Hematite and Shells)

Kambaba Jasper (Crocodile Jasper) (Stromatolite (Fossilized Algae within Microcrystalline Quartz), SiO2) — sedimentary

Kambaba Jasper (Crocodile Jasper)

Stromatolite (Fossilized Algae within Microcrystalline Quartz), SiO2

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Limestone River Pebble

Sedimentary Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Dendritic Agate or Manganese Nodule in Chert/Limestone (Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions) — sedimentary

Dendritic Agate or Manganese Nodule in Chert/Limestone

Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions

Sandstone (Weathered Pebble) (Arenite (SiO2 primarily)) — sedimentary

Sandstone (Weathered Pebble)

Arenite (SiO2 primarily)

Crushed Limestone Aggregate (Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Crushed Limestone Aggregate

Limestone (Calcium Carbonate, CaCO3)

Sandstone (Fossiliferous) (Arenite / Clastic Sedimentary Rock) — sedimentary

Sandstone (Fossiliferous)

Arenite / Clastic Sedimentary Rock

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Dendritic Agate (Silicon Dioxide with Manganese/Iron oxide inclusions (SiO2)) — mineral

Dendritic Agate

Silicon Dioxide with Manganese/Iron oxide inclusions (SiO2)

Sandstone with Concretions / Liesegang Rings (Arenite with iron oxide banding) — sedimentary

Sandstone with Concretions / Liesegang Rings

Arenite with iron oxide banding

Quartzwacke / Impure Sandstone (Arenite with minor lithic fragments (Silicon Dioxide matrix)) — sedimentary

Quartzwacke / Impure Sandstone

Arenite with minor lithic fragments (Silicon Dioxide matrix)

Ironstone Concretion (Siderite or Hematite Concretion) — sedimentary

Ironstone Concretion

Siderite or Hematite Concretion

Limestone (Calcite (CaCO3)) — sedimentary

Limestone

Calcite (CaCO3)

Sandstone (Arenite (Siliclastic sedimentary rock)) — sedimentary

Sandstone

Arenite (Siliclastic sedimentary rock)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Sandstone (Ferruginous) (Arenite (SiO2 with iron oxide impurities)) — sedimentary

Sandstone (Ferruginous)

Arenite (SiO2 with iron oxide impurities)

Sandstone (likely Arkosic) (Arenite (SiO2 based)) — sedimentary

Sandstone (likely Arkosic)

Arenite (SiO2 based)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Arenite (often composed of Quartz, SiO2)) — sedimentary

Sandstone

Arenite (often composed of Quartz, SiO2)

Yellow Ocherous Siltstone (Limonitic Shale) (Limonitic Siltstone / Goethite-rich Sedimentary Rock) — sedimentary

Yellow Ocherous Siltstone (Limonitic Shale)

Limonitic Siltstone / Goethite-rich Sedimentary Rock

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Crushed Limestone (Calcite-rich Sedimentary Rock (CaCO3)) — sedimentary

Crushed Limestone

Calcite-rich Sedimentary Rock (CaCO3)

Chert (containing a small fossil) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (containing a small fossil)

Microcrystalline Quartz (SiO2)

Fossiliferous Limestone (Crinoidal Limestone) (Calcium Carbonate with Crinoid Stem Fossils (CaCO3)) — sedimentary

Fossiliferous Limestone (Crinoidal Limestone)

Calcium Carbonate with Crinoid Stem Fossils (CaCO3)

Red Sandstone (Arenite (primarily Quartz SiO₂ with Hematite Fe₂O₃ staining)) — sedimentary

Red Sandstone

Arenite (primarily Quartz SiO₂ with Hematite Fe₂O₃ staining)

Glauconitic Sandstone (Glauconitic Sandstone (Greensand)) — sedimentary

Glauconitic Sandstone

Glauconitic Sandstone (Greensand)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Coquina or Fossiliferous Limestone (Fossiliferous Calcarenite (CaCO3)) — sedimentary

Coquina or Fossiliferous Limestone

Fossiliferous Calcarenite (CaCO3)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Siltstone (Siltstone (primarily SiO2 with Al2O3)) — sedimentary

Siltstone

Siltstone (primarily SiO2 with Al2O3)