Sandstone
Arenite (primarily SiO2)
Category
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
Sandstone
Arenite (primarily SiO2)
Sandstone (with minor weathering/pitting)
Clastic Sedimentary Rock (composed mostly of SiO2)
Quartzwacke / Impure Sandstone
Arenite with minor lithic fragments (Silicon Dioxide matrix)
Conglomerate
Conglomerate (clastic sedimentary rock)
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
Limonite (Iron Ore)
Hydrated ferric oxide mixture (FeO(OH)·nH2O)
Yellow Ochre / Limonite
Hydrated ferric oxide (FeO(OH)·nH2O)
Limonite (Limonitic Sandstone)
Hydrated Iron(III) Oxide-Hydroxide ($FeO(OH)·nH_2O$)
Shale
Argillite / Shale
Halite
Halite (NaCl)
Sandstone
Arenite (predominantly SiO2 with iron oxides)
Quartz Mineral Specimens
Quartz (Silicon Dioxide, SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone Pebble
Arenite (SiO2 complex)
Sandstone (with Siltstone/Greywacke variations)
Sedimentary Rock (Clastic)
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone
Arenite
Pyrite
Iron Sulfide (FeS2)
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
Ironstone (likely Limonite or Goethite nodule)
Hydrothermally altered Ferric Hydroxide (FeO(OH)·nH2O)
Limonite with Hematite
Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)
Pyrite in Matrix
Iron Sulfide (FeS2)
Limonite Concretion
FeO(OH)·nH2O (Hydrated Iron Oxide)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Quartz Geode
Silicon Dioxide (SiO2)
Magnetite
Magnetite (Fe3O4)
Quartz Geode
Silicon Dioxide (SiO2)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
Shale
Shale (clastic sedimentary rock)
Shale
Fissile Siliciclastic Sedimentary Rock
Shale with Siltstone layering
Sedimentary Clastic Rock (Mudstone/Shale)
Sandstone with Iron Concretion
Arenite with Limonite/Goethite Concretion
Sandstone
Arenite (SiO2 predominantly)
Sandstone
Arenite (lithic or quartz sandstone)
Pyrite
Iron Disulfide (FeS2)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
Pyrite
Iron Sulfide (FeS2)
Sandstone
Arenite (primarily SiO2)