Limestone
Calcium Carbonate (CaCO3)
Category
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
Blue Chalcedony
Microcrystalline Quartz (SiO2)
Basalt with Caliche Crust
Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating
Gneiss
Gneiss
Mica Schist
Crystalline Schist (often containing Muscovite, Biotite, and Quartz)
Granitic Gneiss
Gneiss (containing Potassium Feldspar and Quartz)
Pebble (river rock/beach pebble)
Pebble (clast size class)
Gneiss
Gneiss
Gneiss
Gneiss (high-grade metamorphic rock)
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
Banded Gneiss
Gneiss (Metamorphic Rock)
Almandine Garnet in Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
Sandstone (Ferruginous)
Arenite with Iron oxide staining (SiO2 with Fe2O3)
Blue Kyanite
Kyanite (Al2SiO5)
Jasper
Silicon Dioxide (SiO2)
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
Fossiliferous Chert with Brachiopod Impression
Chert (SiO2) containing Brachiopoda fossil remains
Sandstone
Arenite (composed primarily of SiO2)
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
Shale (Ferruginous)
Laminated Mudrock (Siliciclastic Sedimentary Rock)
Dalmatian Stone
Dalmatian Jasper (Aplitic Rock)
Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite
Chert (Flint)
Microcrystalline Quartz (SiO2)
Sandstone Concretion
Sandstone (Sedimentary Rock) with silica or calcite cement
Red Jasper (Brecciated Jasper)
SiO2 (Silicon Dioxide) with Ferric Iron inclusions
Conglomerate
Conglomerate rock
Sandstone Chert Concretion
Silica-cemented Concretion (primarily SiO2)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
Black Sand (Magnetite Sand)
Magnetite-rich Placers (Fe3O4)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Garnet (Almandine)
Almandine, Fe3Al2(SiO4)3
Travertine (Ceramic Tile)
Terrestrial Sedimentary Rock / Calcium Carbonate (CaCO3)
Conglomerate
Conglomerate rock
Sandstone
Arenite (primarily SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Quartz (Pebble)
Quartz (SiO₂)
Ironstone (with possible Hematite/Limonite coating)
Ironstone (Fe-rich sedimentary rock)
Sandstone (likely Quartzose Sandstone)
Arenite