Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Category
Browse mineral on sedimentary specimens identified by the Rock Identifier community.
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Limonite (Iron Stone/Goethite)
Limonite (mixture of hydrated iron oxides, primarily Goethite: α-FeO(OH))
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Disulfide (FeS2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Sandstone (Red/Brown Variety)
Arenite (SiO2 with iron oxide impurities)
Sandstone (Pebble/Cobble)
Arenite (primarily SiO2)
Brachiopod Fossil
Phylum Brachiopoda (likely Order Rhynchonellida or Spiriferida)
Sandstone
Arenite (primarily SiO2)
Red Sandstone Pebble
Arenite with Hematite (Fe2O3) cement
Basalt with Caliche Crust
Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating
Quartz (Milky/Rose variety)
Silicon Dioxide (SiO2)
Sandstone (Ferruginous)
Arenite (with Iron Oxide)
Sandstone (Quartzose type)
Arenite (primarily SiO2)
Quartz Veinated Sandstone or Siltstone
Silicon Dioxide (SiO2) within a clastic sedimentary matrix
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
Dalmatian Stone (commonly Dyed)
Dalmatian Jasper (Peralkaline igneous rock)
Quartz (Microcrystalline/Gravel)
Silicon Dioxide (SiO2)
Galena
Lead(II) sulfide (PbS)
Chalcedony (Botryoidal Agate vein)
Chalcedony (Microcrystalline Quartz) - SiO2
Sandstone (Quartzose Pebble)
Clastic Sedimentary Rock (Litharenite/Quartz arenite)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (specifically Picture Sandstone or Wonderstone)
Arenite (composed primarily of SiO2)
Hematite (Oolitic or Earthy variety)
Iron(III) oxide (Fe2O3)
Rhodonite (in matrix)
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Limonite (Iron Ore Congcretion)
Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)
Botryoidal Hematite (included in Quartz/Limonite matrix)
Fe2O3 (Hematite) on Quartz (SiO2) / Limonite
Sandstone Pebbles
Arenite (Sedimentary rock composed of sand-sized grains)
Halite
Halite (Sodium Chloride, NaCl)
Red Jasper
Silicon Dioxide with Iron Oxide (SiO2)
Sandstone
Arenite
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (Sandstone)
Limonite (Iron Ore)
Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O
Sandstone
Clastic Sedimentary Rock (composed primarily of Quartz: SiO2)
Chert (Jasper-like Silicate)
Microcrystalline Quartz (SiO2)
Jasper
Jasper (Silicate mineral, SiO2)
Jasper
Jasper (Silicate mineral, SiO2)
Chert (Jasper variation)
Chert (Silicate mineral, SiO2)
Red Jasper
Jasper (Silicate Mineral - SiO2)
Sandstone (likely Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)