Oolitic Limestone (Oolite)
Oolitic Limestone (primarily Calcium Carbonate, CaCO3)
sedimentary
Category
Sedimentary (Man Made Composite)
Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Quartz Veinated Sandstone or Siltstone
Silicon Dioxide (SiO2) within a clastic sedimentary matrix
sedimentary
Sandstone (likely Siltstone or Mudstone variety)
Clastic Sedimentary Rock (primarily SiO2 with iron oxides)
sedimentary
Quartz-veined Siltstone/Greywacke
Clastic Sedimentary Rock with Quartz Infill (SiO2 vein)
sedimentary
Shale with Pyrite
Clastic sedimentary rock containing Iron Disulfide (FeS2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Chert Conglomerate (or Breccia)
Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)
sedimentary
Chert (includes Flint & Jasper)
Chert (Siliceous sedimentary rock, chemical formula SiO2)
sedimentary
Grey River Pebble (Likely Quartz-rich or Limestone)
Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)
sedimentary
Quartz Geode in Chert/Limestone Matrix
Silicon Dioxide (SiO2) within Sedimentary Host Rock
sedimentary
Sandstone Concretion with Quartz Center
Sedimentary Clastic Rock (SiO2 matrix with Quartz core)
sedimentary
Fossiliferous Shale Matrix
Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments
sedimentary
Milky Quartz in Conglomerate Matrix
Silicon Dioxide (SiO2) within Clastic Sedimentary Rock
sedimentary
Chert
Siliceous sedimentary rock (predominantly microcrystalline quartz, SiO2)
Sedimentary
Conglomerate with Quartz Inclusions
Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)
sedimentary
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (composed primarily of Quartz sand with Hematite/Goethite shell)
sedimentary
Ferruginous Sandstone (with possible trace fossils)
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3)
sedimentary
Banded Jasper with Hematite or Quartz
Silicon Dioxide (SiO2) with impurities
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Yellow/Tan Variety)
Chert (SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2, or Silicon Dioxide)
sedimentary
Sandstone (likely Quartzite-grade)
Arenite (primarily SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Bauxite
Al2O3·2H2O (principally composed of gibbsite, boehmite, and diaspore)
sedimentary
Limestone (Brecciated/Recrystallized)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (with potentially metamorphic or basaltic bands)
Arenite / Lithic Wacke
sedimentary
Sandstone with Liesegang Rings
Arenite with Iron Oxide Concretions
sedimentary
Orange Calcite
Calcite (CaCO3)
Mineral
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 major component)
sedimentary
Sandstone (Quartzose)
Sandstone (clastic sedimentary rock, primarily SiO2)
sedimentary
Chert (Yellow Jasper variant)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Fossil Coral (Favosites Honeycomb)
Favosites (Genus), Phylum Cnidaria, Class Anthozoa
sedimentary
Hematite (Oolitic or Earthy variety)
Iron(III) oxide (Fe2O3)
mineral
Pyrite
Pyrite (FeS₂)
Mineral
Septarian Nodule (Thunder Egg)
Septarian Concretion (CaCO3 + CaMg(CO3)2 + SiO2)
sedimentary
Geode (Unopened)
Silica-rich Concretion (primarily SiO2)
sedimentary