Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
Category
Browse sedimentary or mineral specimens identified by the Rock Identifier community.
Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Ironstone (likely Limonite or Goethite nodule)
Hydrothermally altered Ferric Hydroxide (FeO(OH)·nH2O)
Limonite with Hematite
Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)
Ironstone Concretions (Ironstone)
Ferruginous Sandstone or Siltstone (Fe2O3)
Pyrite in Matrix
Iron Sulfide (FeS2)
Sandstone / Weathered Quartzite
Sandstone (Quartz Arenite)
Sandstone with Iron Concretion
Arenite with Limonite/Goethite Concretion
Sandstone
Arenite
Banded Sandstone (River Cobble)
Arenite Sandstone with heavy mineral layering
Magnetite (Lodestone)
Magnetite (Fe3O4)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Quartz Geode
Silicon Dioxide (SiO2)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
River Stone (Sedimentary Sandstone/Quartzite)
Arenite/Quartzite transition specimen
Pyrite
Iron Disulfide (FeS2)
Sandstone (with Siltstone/Greywacke variations)
Sedimentary Rock (Clastic)
Sandstone
Arenite (SiO2 predominantly)
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
Conglomerate
Conglomerate (clastic sedimentary rock)
Quartzwacke / Impure Sandstone
Arenite with minor lithic fragments (Silicon Dioxide matrix)
Sandstone (with Concretion)
Arenite / Quartzose Sandstone
Agate
Silicon Dioxide (SiO2)
Quartz, Sandstone, and Siltstone specimens
Silicon Dioxide (SiO2) and Clastic Sedimentary Rocks
Quartz Geode
Silicon Dioxide (SiO2) in Calcareous or Siliceous Matrix
Fossiliferous Shale
Sedimentary Clastic Rock with fossil inclusions (likely Brachiopod or Bivalve impressions)
Sandstone
Arenite (predominantly SiO2 with iron oxides)
Shale
Fissile Siliciclastic Sedimentary Rock
Sandstone (with ripple marks)
Arenite / Quartz Sandstone
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
Sandstone
Arenite (lithic or quartz sandstone)
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone
Arenite (SiO2 dominant)
Fluorite (Fluor-spar)
Calcium Fluoride (CaF2)
Sandstone
Arenite (Clastic Sedimentary Rock)
Botryoidal Hematite
Iron(III) oxide (Fe2O3)
Bornite
Bornite (Cu5FeS4)
Sandstone
Arenite (primarily SiO2)
Shale with Siltstone layering
Sedimentary Clastic Rock (Mudstone/Shale)