Rock Identifier

Category

Sedimentary (Fossilized Organic Remain)

Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Zebra Jasper (Silicon Dioxide (SiO2) - Macro-crystalline Quartz/Chert with impurities) — sedimentary

Zebra Jasper

Silicon Dioxide (SiO2) - Macro-crystalline Quartz/Chert with impurities

Sandstone (with potential Arkose/Lithic characteristics) (Arenite (Sedimentary rock composed of sand-sized grains)) — sedimentary

Sandstone (with potential Arkose/Lithic characteristics)

Arenite (Sedimentary rock composed of sand-sized grains)

Flint (variety of Chert) (Silicon Dioxide (SiO2)) — sedimentary

Flint (variety of Chert)

Silicon Dioxide (SiO2)

Banded Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Quartz (Milky/Common) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Chert (Yellow or Tan variety) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow or Tan variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert Concretion (with typical hematite/limonite staining) (Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)) — sedimentary

Chert Concretion (with typical hematite/limonite staining)

Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)

Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (varieties: Flint or Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (varieties: Flint or Jasper)

Microcrystalline Quartz (SiO2)

Amber Flint (Chert) (Cryptocrystalline Quartz (Silicon Dioxide, SiO2)) — sedimentary

Amber Flint (Chert)

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Chert (varietal Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (varietal Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz (Silicon Dioxide (SiO2)) — Mineral

Quartz

Silicon Dioxide (SiO2)

Pyrite (Iron Pyrite (FeS₂)) — Mineral

Pyrite

Iron Pyrite (FeS₂)

Sandstone (Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)) — sedimentary

Sandstone

Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)

Fossiliferous Chert with Brachiopod Impression (Chert (SiO2) containing Brachiopoda fossil remains) — sedimentary

Fossiliferous Chert with Brachiopod Impression

Chert (SiO2) containing Brachiopoda fossil remains

Quartz (with inclusions / Sandstone fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (with inclusions / Sandstone fragment)

Silicon Dioxide (SiO2)

Sandstone (clastic) (Clastic Sedimentary Rock (primarily composed of SiO2)) — sedimentary

Sandstone (clastic)

Clastic Sedimentary Rock (primarily composed of SiO2)

Sandstone (Sandstone (clastic sedimentary rock, predominantly SiO2)) — sedimentary

Sandstone

Sandstone (clastic sedimentary rock, predominantly SiO2)

Sandstone (Clastic Sedimentary Rock (primarily Quartz, SiO2)) — sedimentary

Sandstone

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Chert (Yellow Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Yellow Jasper)

Silicon Dioxide (SiO2)

Chert (Black Chert/Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Black Chert/Flint)

Silicon Dioxide (SiO2)

Chert (Chert / Flint nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Chert / Flint nodule)

Silicon Dioxide (SiO2)

Chert (Grey-Green Flint) (Microcrystalline silicon dioxide (SiO2)) — sedimentary

Chert (Grey-Green Flint)

Microcrystalline silicon dioxide (SiO2)

Mookaite Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Mookaite Jasper

Silicon Dioxide (SiO2) with impurities

Quartz Geode (Cracked) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Cracked)

Silicon Dioxide (SiO2)

Dyed Howlite (Dyed Red) (Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)) — mineral

Dyed Howlite (Dyed Red)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Quartz Geode (with Calcite influence) (Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)) — mineral

Quartz Geode (with Calcite influence)

Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

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

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Optical Calcite (Iceland Spar) (Calcite (CaCO3)) — mineral

Optical Calcite (Iceland Spar)

Calcite (CaCO3)

Garnet (Almandine) (Almandine, Fe3Al2Si3O12) — mineral

Garnet (Almandine)

Almandine, Fe3Al2Si3O12

Limonite/Goethite (Iron Ore) (Hydrous ferric oxides (FeO(OH)·nH2O)) — mineral

Limonite/Goethite (Iron Ore)

Hydrous ferric oxides (FeO(OH)·nH2O)

Specular Hematite with Quartz and Limonite (Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)) — Mineral

Specular Hematite with Quartz and Limonite

Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)

Quartz (Milky/Common) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Chert (Nodule) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Nodule)

Chert (Silicon Dioxide, SiO2)

Native Gold (in earring form) (Gold (Au)) — mineral

Native Gold (in earring form)

Gold (Au)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Flint / Chert (Silicon dioxide (SiO2)) — sedimentary

Flint / Chert

Silicon dioxide (SiO2)

Pyrite with Iron Oxides (Fool's Gold in Matrix) (Iron Sulfide (FeS2)) — mineral

Pyrite with Iron Oxides (Fool's Gold in Matrix)

Iron Sulfide (FeS2)

Specular Hematite (Polished Sphere) (Hematite (Alpha Fe2O3)) — mineral

Specular Hematite (Polished Sphere)

Hematite (Alpha Fe2O3)

Almandine Garnet in Matrix (Almandine, Fe3Al2(SiO4)3) — metamorphic

Almandine Garnet in Matrix

Almandine, Fe3Al2(SiO4)3