Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
Sandstone
Arenite (primarily SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Magnetite / Ironstone
Magnetite (Fe3O4)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Red Jasper (Quartz)
Silicon Dioxide (SiO2) with Iron impurities
Red Jasper
Microcrystalline Quartz (SiO2)
Pyrite
Iron Sulfide (FeS2)
Quartz Geode
Silicon Dioxide (SiO2) within a sedimentary or igneous host
Brachiopod Fossil in Matrix
Phylum Brachiopoda
Banded Sandstone
Clastic Sedimentary Sandstone
Sandstone
Arenite (SiO2 based)
Sandstone (Micaceous)
Clastic Sedimentary Rock - Micaceous Litharenite (SiO2 principal)
Sandstone
Arenite (primarily SiO2)
Banded Iron Formation
Banded Iron Formation (BIF)
Glauconitic Sandstone
Glauconitic sandstone ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
Sandstone or Siltstone
Arenite or Siltstone
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone (River Pebble)
Calcite (Calcium Carbonate) - CaCO3
Limestone
Calcium Carbonate (CaCO3)
Fossilized Fish Skeleton in Matrix
Vertebrata (Class: Actinopterygii), typically found in limestone or shale matrices
Banded Sedimentary Rock
Stratified Siliciclastic / Arenite or Siltstone with Mineral Bands
Weathered Sedimentary Rock with Liesegang Rings
Sandstone or Siltstone with Iron Oxide Banding
Sandstone (Sedimentary Rock)
Arenite (SiO2 based)
Chalk (Sedimentary Limestone)
Calcite (CaCO3)
Sedimentary River Rock
Siliciclastic Sedimentary Rock (Quartzite or Sandstone pebble)
Banded Sedimentary Rock (Siltstone/Mudstone with concretion)
Siltstone with Ferruginous Banding
River Stone (Sedimentary Sandstone/Quartzite)
Arenite/Quartzite transition specimen
Chert with Limestone
Microcrystalline Quartz (SiO2) in Calcium Carbonate (CaCO3) matrix
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Chert (Beach Pebble)
Microcrystalline Quartz (SiO2)
Tumbled Clear Quartz
Silicon Dioxide (SiO2)
Calcite (likely honey/orange calcite)
Calcite — calcium carbonate, CaCO₃
Coquina / Fossiliferous Limestone
Fossiliferous Limestone / CaCO3
Fossiliferous Limestone with Brachiopod
Phylum Brachiopoda in Sedimentary Matrix (CaCO3)
Limonite / Ironstone Nodule
Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O
Sandstone
Arenite
Sandstone with Quartz Vein
Quartzose Sandstone with Hydrothermal Quartz
Chert or flint fragment
Microcrystalline quartz (SiO₂), likely silicified rock