Glauconitic Sandstone (Greenstone)
Glauconitic Siliciclastic Sandstone (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2
Category
Browse sedimentary (artificial) specimens identified by the Rock Identifier community.
Glauconitic Sandstone (Greenstone)
Glauconitic Siliciclastic Sandstone (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Banded Chert
Cryptocrystalline Quartz (SiO2)
Druzy Quartz (part of a Geode)
Silicon Dioxide (SiO2)
Chert (Flint)
Chert (predominantly SiO₂ - silicon dioxide)
Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
Limestone with Bitumen/Chert
Calcite (CaCO3) containing organic hydrocarbons
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with iron oxide Fe2O3 cement)
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
Sandstone
Arenite
Sandstone (Green/Yellow Siltstone variant)
Arenite or Siltstone (primarily SiO2 with mineral staining)
Sandstone Clast
Arenite (primarily SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone (Pebble)
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2 with minor Fe2O3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Arenite with Iron oxide staining (SiO2 with Fe2O3)
Limestone
Calcium Carbonate (CaCO3)
Limestone (specifically fossiliferous/skeletal limestone)
Calcium Carbonate (CaCO3)
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (SiO2 based with various mineral cements)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone (specifically Arkose or Quartz Arenite)
Arenite (primarily SiO2 with possible Feldspar)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based clastic rock)
Chert (specifically tan/pink variety)
Silicon Dioxide (SiO2)
Ironstone Concretion / Limonite Node
Ferruginous Sedimentary Rock (composed primarily of Limonite FeO(OH)·nH2O and Goethite)
Banded Sandstone
Arenite (composed primarily of Quartz: SiO2)
Shale
Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)
Jasper
Silicon dioxide (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Red Sandstone
Arenite (with Iron Oxide cement)
Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (often called Flint or Jasper depending on color)
Chert (SiO2 - Microcrystalline or Cryptocrystalline Quartz)
Metaconglomerate
Protolith: Conglomerate (comprising SiO2, Al2O3, etc.)