Chalk (Sedimentary Pebble)
Calcium Carbonate (CaCO3) - Biogenic Limestone
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Chalk (Sedimentary Pebble)
Calcium Carbonate (CaCO3) - Biogenic Limestone
Fossiliferous Sedimentary Rock (Coquina/Limestone)
Fossiliferous Calcarenite / Bioclastic Limestone
Weathered brown stone, possibly basalt or iron-rich sedimentary rock
Indeterminate from photograph; likely fine-grained mafic rock (basalt) or ferruginous sandstone
Sandstone
Arenite
Sandstone with Quartz Sphere
Arenite (SiO2-rich sedimentary rock) with Quartzite/Rose Quartz sphere
Flint or chert flake
Microcrystalline quartz (SiO₂), commonly chalcedony with possible impurities
Sandstone
Sandstone (composed mainly of SiO2)
Sandstone
Arenite
Limestone with Calcite Veining
Sedimentary Rock (Calcium Carbonate, CaCO3)
Sandstone (Calcareous)
Clastic sedimentary rock (primarily SiO2 with CaCO3 cement)
Sandstone Pebble
Arenite (SiO2 primarily)
Sandstone
Arenite
Limestone
Sedimentary rock composed primarily of Calcite (CaCO3)
Sandstone
Arenite (primarily SiO2)
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 principal component)
Granular Sandstone
Arenite (variable composition, primarily SiO2)
Limestone (with Calcite Veining)
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primarily)
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite (primarily SiO2)
Limestone (Micritic)
Sedimentary rock mainly composed of Calcium Carbonate (CaCO3)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone (Red/Brown Variety)
Arenite (SiO2 with iron oxide impurities)
Sandstone
Arenite (primarily SiO2)
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (Sandstone)
Limestone
Carbonate rock (CaCO3)
Sandstone (Pebble/Cobble)
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 based)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone (likely with Quartz Veining)
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Limestone (River Pebble)
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
Limestone
Calcium Carbonate (CaCO3)
Dendritic Siltstone
Siltstone with Manganese Dendrites (MnO2)
Sandstone
Arenite (primarily Quartz-rich sedimentary rock)
Sandstone
Arenite (primarily SiO2)