Pyrite
Iron Sulfide (FeS2)
Category
Browse sedimentary specimens identified by the Rock Identifier community.
Pyrite
Iron Sulfide (FeS2)
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
Banded Calcite (often sold as Caribbean Calcite or Honey Calcite)
Calcium Carbonate (CaCO3)
Calcite
Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite (primarily SiO2)
Quartzwacke / Impure Sandstone
Arenite with minor lithic fragments (Silicon Dioxide matrix)
Chert Pebble (Jasperoid/Flint)
Silicon Dioxide (SiO2) - cryptocrystalline quartz
Sandstone
Arenite (primarily SiO2)
Ferruginous Sandstone
Clastic Sedimentary Rock (Sandstone with Iron Oxide cement)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (SiO2 with Fe2O3/FeO oxides)
Marble
Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)
Chert / Red Jasper
Microcrystalline Quartz (SiO2)
Glauconite
(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Limonite Sandstone
Ferruginous Sandstone (Hydrated Iron Oxide)
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
Ironstone Concretion (Limonite/Goethite)
Iron-rich sedimentary rock (FeOx)
Sandstone Geode
Sedimentary Geode (Silica/Calcite composition)
Banded Sandstone
Clastic Sedimentary Rock (Quartz Arenite)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Druzy Quartz on Sandstone
Silicon Dioxide (SiO2) on Sedimentary Host Rock
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Iron-stained)
Arenite with Limonite/Hematite staining
Chert or Jasper
Microcrystalline Quartz (SiO2)
Fossiliferous Limestone with Quartz Veining
Limestone (Calcium Carbonate, CaCO3)
Sandstone
Sandstone (Silicon dioxide, SiO2 based)
Sandstone
Arenite
Sandstone
Arenite (SiO2 based)
Sandstone Cobble
Arenite (Sandstone)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone
Arenite (typically SiO2 based)
Leopard Skin Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
Sandstone with Quartz Vein
Arenite with Crystalline Silica (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based typically)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
Sandstone
Arenite (composed primarily of SiO2)
Fossiliferous Limestone
Calcium Carbonate - CaCO3
Limestone
Calcium Carbonate (CaCO3)