Sandstone (Ferruginous)
Arenite (Fe-oxide cemented)
Category
Browse sedimentary (artificial) specimens identified by the Rock Identifier community.
Sandstone (Ferruginous)
Arenite (Fe-oxide cemented)
Shale
Fissile Mudstone
Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)
Gastropod Steinkern (Internal Mold Fossil)
Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix
General Rock and Mineral Collection (Center: Angelite / Blue Anhydrite)
Anhydrite (Calcium Sulfate, CaSO4)
Banded Sandstone (Zebra Stone)
Arenite with Iron Oxide Banding (Liesegang rings)
Sandstone with Ironstone Concretion
Arenite with Hematite/Goethite nodules (Fe2O3 / FeO(OH))
Sandstone Concretion
Sedimentary concretion
Sandstone or Limestone
Sedimentary Rock
Sandstone
Arenite (primarily SiO2)
Shale
Fissile mudrock (composed of clay-sized particles and detrital grains)
Shale
Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)
Shale
Clastic sedimentary rock (primarily clay and silt minerals)
Shale
Shale (Lutite)
Shale
Fissile mudstone (rich in clay minerals and quartz)
Shale
Fissile mudrock (composed primarily of clay minerals and quartz)
Pyrite
Iron Sulfide (FeS2)
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.)
Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)
Flesh-toned Siltstone
Siltstone (composed of microscopic Quartz and Feldspar grains)
Shale
Shale (fine-grained clastic sedimentary rock)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Shale with Siltstone layering
Sedimentary Clastic Rock (Mudstone/Shale)
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
Chert (Jasper/Opaline variety)
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Pyrite
Iron Sulfide (FeS2)
Moqui Marble (Concretion)
Iron Oxide Concretion (Hematite-cemented Sandstone)
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
Sedimentary Breccia
Clastic Breccia (CaCO3/SiO2 matrix)
Chert (specifically Gray/Blue-Gray Chert)
Chert (SiO2)
Devil's Toenail
Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)
Pebble (likely Quartz or Chert)
SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.
Sandstone (Micaceous)
Arenite (composed primarily of SiO2)
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
Chert (Tan/Yellow variety)
Microcrystalline quartz (SiO2)
Sandstone (Ferruginous)
Arenite with Iron Oxide (Fe2O3) cement
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
Orange Calcite
Calcium Carbonate (CaCO3)
Jasper (Iron-rich)
Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities
Red Jasper (Polished)
Jasper (Iron-rich Microcrystalline Quartz, SiO2)