Shale
Shale (Lutite)
Category
Browse sedimentary or mineral specimens identified by the Rock Identifier community.
Shale
Shale (Lutite)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (composed mostly of SiO2)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
Garnet in Matrix (Schist or Quartz)
Almandine Garnet, Fe3Al2(SiO4)3
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Sandstone
Arenite (SiO2 secondary)
Red Sandstone
Arenite (Fe2O3 rich)
Bauxite
Bauxite (Al(OH)3, AlO(OH))
Bauxite
Bauxite (Al2O3·nH2O)
Chert (specifically Flint or Jasper variant)
Microcrystalline Quartz (SiO2)
Bauxite
Bauxite (Al2O3·nH2O)
Quartz Geode
Silicon Dioxide (SiO2)
Sandstone
Arenite (primarily SiO2)
Red Sandstone
Arenite (Ferruginous Sandstone)
Stromatolite
Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)
Fossilized Bone Fragment
Permineralized Vertebrate Bone (Hydrox yapatite replaced by Silica or Calcite)
Fossilized Oyster Shell
Exogyra or Ostrea (Gryphaeidae/Ostreidae family)
Sandstone
Arenite (SiO2 based clastic rock)
Quartz Pebble
Silicon Dioxide (SiO2)
Sparkling Druzy Quartz on Matrix
Silicon Dioxide (SiO2) with iron oxide inclusions
Red Sandstone
Arenite (SiO2 with Fe2O3)
Sandstone
Arenite (SiO2 primarily)
Red Sandstone
Arenite (Ferruginous Sandstone)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Red Jasper Pebble
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Sandstone (Quartzose)
Arenite (primarily SiO2)
Bauxite
Bauxite (Al(OH)3, AlO(OH), AlOOH)
Pyrite
Iron Disulfide (FeS2)
Sulfur on matrix
Native Sulfur (S8)
Sandstone (likely Arkosic or Quartzose)
Arenite (SiO2 based with mineral inclusions)
Shale with Quartz Veins
Fissile Sedimentary Rock (SiO2)
Sandstone
Arenite (composed of SiO2, CaCO3, or iron oxides)
Limonite / Goethite (Ironstone)
Hydrated Iron(III) Oxide-Hydroxide FeO(OH)wnH2O
Sandstone (likely Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Chalcedony on Matrix
Silicon Dioxide (SiO2)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone (Greywacke)
Arenite/Greywacke (SiO2 major)
Sandstone (Quartz-rich)
Arenite (composed primarily of SiO2)
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Gneiss
Gneiss (High-grade regional metamorphic rock)