Limestone
Calcium Carbonate (CaCO3)
Category
Browse anthropogenic sedimentary (man made) specimens identified by the Rock Identifier community.
Limestone
Calcium Carbonate (CaCO3)
Sandstone (with differential weathering)
Arenite / Quartz Sandstone (SiO2)
Sandstone (specifically an Iron-Concretion)
Arenite with Iron Oxide (Limonite/Goethite) cementation
Chert (Smooth River Stone)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
Polished orbicular jasper (likely ocean jasper)
Silicified volcanic rock; chiefly microcrystalline quartz (SiO₂), with feldspar and iron-rich alteration minerals
Weathered Sandstone
Quartz Arenite / Clastic Sedimentary Rock
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3 - Calcite)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Quartz
Silicon Dioxide (SiO2)
Chert (Flint Nodules)
Chert (Silicon Dioxide, SiO2)
Red Jasper
Silicon Dioxide (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Orbicular Jasper
Silicon Dioxide (SiO2)
Quartz
Silicon dioxide (SiO2)
Limestone Pebble
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone (River Stone)
Calcium Carbonate (CaCO3)
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2)
Sandstone (Quartz-rich Cobble)
Arenite
Red Sandstone
Arenite (Ferruginous Sandstone)
Limestone
Calcium Carbonate (CaCO3)
Limestone (River Pebble)
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
Limestone with Bitumen/Chert
Calcite (CaCO3) containing organic hydrocarbons
Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
Sandstone
Arenite
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with iron oxide Fe2O3 cement)
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
Sandstone (Green/Yellow Siltstone variant)
Arenite or Siltstone (primarily SiO2 with mineral staining)
Sandstone Clast
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2 with minor Fe2O3)
Sandstone
Arenite (composed primarily of SiO2)
Limestone with Fossil inclusions
Fossiliferous Limestone (CaCO3)
Sandstone (Pebble)
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Arenite with Iron oxide staining (SiO2 with Fe2O3)
Limestone or Chalk
Calcium Carbonate (CaCO3)