Granite
Granite (Phaneritic intrusive igneous rock; primarily SiO2 and Al2O3)
Category
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
Granite
Granite (Phaneritic intrusive igneous rock; primarily SiO2 and Al2O3)
Likely quartz crystal fragment
Quartz (SiO₂), possibly a small tumbled or cleaved fragment
Dolomite
Dolomite (CaMg(CO3)2)
Sandstone (Ferruginous)
Sandstone (SiO2 with iron oxide impurities)
Sandstone (lithic wacke/arenite)
Clastic sedimentary rock (SiO2 + varied clasts)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (primarily Quartz chemical formula SiO2)
Sandstone (Ferruginous)
Arenite with Iron Oxide matrix
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based)
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
Limestone with Lichen
Carbonate Sedimentary Rock (primarily CaCO3)
Sandstone
Arenite (primarily SiO2)
Limestone Pebble
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Quartz-rich)
Arenite (primarily SiO2)
Sandstone (Fluvial Pebble)
Arenite
Limestone (Riprap)
Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based)
Limestone
Limestone (Calcium Carbonate - CaCO3)
Hematitic Sandstone
Sandstone with Hematite inclusions (SiO2 + Fe2O3)
Sandstone (likely Graywacke or Siltstone variety)
Clastic Sedimentary Rock (SiO2 with assorted mineral fragments)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Sedimentary Limestone (Calcium Carbonate, CaCO3)
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with fossil inclusions
Sandstone
Arenite (primarily SiO2)
Limestone
Calcium carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
Fossiliferous Limestone
Autochthonous Biogenic Sedimentary Rock (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone (specifically Iron-stained or Argillaceous Limestone)
Calcium Carbonate (CaCO3) with Iron Oxide (Fe2O3) impurities
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Clastic Sedimentary Rock (primarily Quartz, SiO2)
Sandstone
Arenite (Secondary classification based on grain size)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Sandstone (clastic sedimentary rock, predominantly SiO2)
Limestone
Limestone (Calcium Carbonate, CaCO3)
Sandstone (Calcareous Sandstone)
Calcareous Sandstone (primarily SiO2 with CaCO3 cement)
Sandstone
Arenite (SiO2 primarily)
Sandstone (Quartzose)
Arenite (primarily SiO2)