Asphalt (Bituminous Slate/Sandstone)
Asphaltum / Bituminous Rock
sedimentary
Category
Sedimentary (Primary) With Artificial Modification
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Chert (v. Flint)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone (Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Chert (Chalcedony/Flint)
Silicon Dioxide (SiO2)
sedimentary
Flint
Chert (Silicon dioxide, SiO2)
sedimentary
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Quartz Vein with Host Rock (Greywacke/Siltstone)
Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix
metamorphic
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2) with hydration
sedimentary
Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
sedimentary
Limonite (Hydrated Iron Oxide / Bog Iron)
FeO(OH)·nH2O
Mineral (Sedimentary context)
Bauxite
Bauxite (mainly Al(OH)3, AlO(OH))
sedimentary
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Fossiliferous Shale (with Vertebrate Bones)
Laminated Mudstone containing Fossilized Bone (Apatite)
sedimentary
Halite (Rock Salt)
Halite (NaCl)
mineral
Magnetite / Hematite mix (Iron Ore)
Fe3O4 (Magnetite) / Fe2O3 (Hematite)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Nobby Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Quartz (Raw Chunk)
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock (Breccia/Rhyolite)
Silicon Dioxide (SiO2) with matrix
Mineral in Igneous/Sedimentary host
Celestine (or Celestite) on Matrix
Celestine (SrSO4)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Calcite
Calcium Carbonate (CaCO3)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (complex silicate composition with iron oxides)
sedimentary
Note: Image shows a biological specimen (Rat), not a rock. Representative geological equivalent: Galena (due to lead-grey colors in fur).
Galena (PbS)
mineral
Chert (often called Flint in various colors)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Sandstone
Clastic Sedimentary Rock (Iron-rich)
sedimentary
Quartz Geode in Sedimentary Matrix
Silicon Dioxide (SiO2) within a limestone/dolostone host
mineral
Quartz (Milky/Clear)
Silicon Dioxide (SiO2)
mineral
Bauxite (Aluminum Ore)
Hydrated aluminum oxides, primarily Al(OH)3, AlO(OH)
sedimentary
Belemnite (Fossilized Rostrum)
Belemnitida (Order), composed of Calcite (CaCO3)
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
metamorphic
Travertine (often colloquially called Tufa)
Chemical Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone Pebble
Calcium Carbonate (CaCO3)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary