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

Ironstone concretion (Siderite or Limonite-rich Concretion (FeO(OH)·nH2O)) — sedimentary

Ironstone concretion

Siderite or Limonite-rich Concretion (FeO(OH)·nH2O)

Ironstone Concretion (Ferruginous Concretion) — sedimentary

Ironstone Concretion

Ferruginous Concretion

Sandstone (Calcareous) (Clastic sedimentary rock (primarily SiO2 with CaCO3 cement)) — sedimentary

Sandstone (Calcareous)

Clastic sedimentary rock (primarily SiO2 with CaCO3 cement)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Limestone with Calcareous Accretion (Sedimentary Carbonate Rock (CaCO3)) — sedimentary

Limestone with Calcareous Accretion

Sedimentary Carbonate Rock (CaCO3)

Black Shale (Argillaceous Chert/Shale) — sedimentary

Black Shale

Argillaceous Chert/Shale

Dendritic Agate (Chalcedony (Silicon Dioxide) with Manganese or Iron Oxide inclusions) — mineral

Dendritic Agate

Chalcedony (Silicon Dioxide) with Manganese or Iron Oxide inclusions

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

Dendritic Quartz

Silicon Dioxide (SiO2) with Manganese Oxide inclusions

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Arenite (SiO2 principal component)) — sedimentary

Sandstone

Arenite (SiO2 principal component)

Dendritic Siltstone (or Mudstone) (Siltstone with Manganese Oxide dendrites) — sedimentary

Dendritic Siltstone (or Mudstone)

Siltstone with Manganese Oxide dendrites

Sandstone Concretion (Sandstone (Sedimentary rock, mostly SiO2)) — sedimentary

Sandstone Concretion

Sandstone (Sedimentary rock, mostly SiO2)

Ironstone Concretion (Siderite or Limonite Concretion) — sedimentary

Ironstone Concretion

Siderite or Limonite Concretion

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

Limestone River Pebble

Sedimentary Calcium Carbonate (CaCO3)

Siltstone with iron staining (Siltstone (primarily SiO2 with FeO(OH) coatings)) — sedimentary

Siltstone with iron staining

Siltstone (primarily SiO2 with FeO(OH) coatings)

Sandstone (Greywacke/Siltstone variant) (Arenite / Wacke (SiO2 with diverse mineral inclusions)) — sedimentary

Sandstone (Greywacke/Siltstone variant)

Arenite / Wacke (SiO2 with diverse mineral inclusions)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Red Sandstone (Old Red Sandstone) (Ferruginous Sandstone (SiO2 + Fe2O3)) — sedimentary

Red Sandstone (Old Red Sandstone)

Ferruginous Sandstone (SiO2 + Fe2O3)

Moqui Marble (Concretion) (Iron Oxide Concretion (Hematite-cemented Sandstone)) — sedimentary

Moqui Marble (Concretion)

Iron Oxide Concretion (Hematite-cemented Sandstone)

Mudstone/Siltstone with Liesegang Bands (Argillaceous Sedimentary Rock with Chemical Banding) — sedimentary

Mudstone/Siltstone with Liesegang Bands

Argillaceous Sedimentary Rock with Chemical Banding

Sandstone (Arenite (SiO2 principal component)) — sedimentary

Sandstone

Arenite (SiO2 principal component)

Chert (Gravel) (Chert (Microcrystalline Silicon Dioxide, SiO2)) — sedimentary

Chert (Gravel)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone Concretion (Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)) — sedimentary

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Limestone Pebble

Sedimentary Calcium Carbonate (CaCO3)

Sandstone Pebbles (Arenite (Sedimentary rock composed of sand-sized grains)) — sedimentary

Sandstone Pebbles

Arenite (Sedimentary rock composed of sand-sized grains)

Dendritic Jasper (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — sedimentary

Dendritic Jasper

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite (Silicon Dioxide, SiO2 based)) — sedimentary

Sandstone

Arenite (Silicon Dioxide, SiO2 based)

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

Crushed Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Crushed Limestone

Calcium Carbonate (CaCO3)

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

Burmese Amber (Burmite)

Burmite (C10H16O)

Chert (Jasper/Agate variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Sandstone Concretion (Sedimentary Concretion (SiO2 or CaCO3 cemented)) — sedimentary

Sandstone Concretion

Sedimentary Concretion (SiO2 or CaCO3 cemented)

Sandstone Concretion (Moqui Marble / Ironstone Concretion (Iron oxide-cemented sandstone)) — sedimentary

Sandstone Concretion

Moqui Marble / Ironstone Concretion (Iron oxide-cemented sandstone)

Crinaudite / Fossilized Crinoid Stem (Crinoid (Echinodermata) in a Calcitic/Siliceous Matrix) — sedimentary

Crinaudite / Fossilized Crinoid Stem

Crinoid (Echinodermata) in a Calcitic/Siliceous Matrix

Chert (Jasper variety) with Iron Oxide staining (Cryptocrystalline Quartz (SiO2) with Goethite/Limonite impurities) — sedimentary

Chert (Jasper variety) with Iron Oxide staining

Cryptocrystalline Quartz (SiO2) with Goethite/Limonite impurities

Ammonite Fossil in Limestone Matrix (Ammonoidea (subclass) in Calcium Carbonate (CaCO3)) — sedimentary

Ammonite Fossil in Limestone Matrix

Ammonoidea (subclass) in Calcium Carbonate (CaCO3)

Amber (Copal) (Succinate (Fossilized Resin)) — mineraloid

Amber (Copal)

Succinate (Fossilized Resin)

Red Sandstone (Arenite (composed primarily of Quartz and Iron Oxide)) — sedimentary

Red Sandstone

Arenite (composed primarily of Quartz and Iron Oxide)