Limonite Concretion
Limonite (Hydrated Iron Oxide) FeO(OH)·nH2O
Category
Browse mineral within sedimentary rock specimens identified by the Rock Identifier community.
Limonite Concretion
Limonite (Hydrated Iron Oxide) FeO(OH)·nH2O
Chalcedony in Limestone Host Rock
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Ironstone Concretion (Ironstone Gourd)
Limonite/Goethite Concretion (FeOO(H))
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
Quartz Vein in Sedimentary Rock
Silicon Dioxide (SiO2) with host Chert or Limestone
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
Ironstone Concretion (Limonite/Goethite)
Goethite-rich Concretion (FeO(OH))
Pyrite in Shale
Iron Disulfide (FeS2)
Herkimer Diamond
Quartz (Silica - SiO2)
Quartz Geode (River Cobble)
Silicon Dioxide (SiO2)
Geode with Iron-Stained Quartz/Calcite
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) in Sedimentary Matrix
Sandstone (with Concretion)
Arenite / Quartzose Sandstone
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 oxides)
Sandstone
Arenite (primarily SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Sandstone with Concretions / Liesegang Rings
Arenite with iron oxide banding
Quartz Geode
Silicon Dioxide (SiO2) within a geode
Brown Sandstone
Arenite (primarily Quartz and Feldspar, with Iron Oxide cement)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2) with various iron-oxide inclusions
Quartz Geode
Silicon Dioxide (SiO2)
Sandstone (with potential fossil inclusions)
Clastic sedimentary rock (primarily SiO2)
Druzy Quartz on Chert/Siltstone
Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix
Sandstone (Ferruginous)
Arenite with Iron Oxide (Limonite/Hematite) coating
Sandstone (Ferruginous)
Arenite (Siliclastic Sedimentary Rock)
Chert (Nodular)
Chert (SiO2 - Microcrystalline Quartz)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
Sandstone (Quartz-rich)
Arenite (SiO2)
Mexican Crazy Lace Agate
Silicon Dioxide (SiO2) with iron and aluminum inclusions
Concretion
Various mineral compositions, typically carbonate or iron oxide cemented sediment
Ironstone Concretion (Nutstone)
Ironstone (with High Limonite/Hematite Content)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Quartz (likely Herkimer Diamond style)
Silicon Dioxide (SiO2)
Dalmatian Jasper / Dalmatian Stone
Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary vugs
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
Banded Sandstone
Arenite with Liesegang banding (primarily SiO2 with FeO(OH) impurities)
Sandstone (Ferruginous)
Arenite (with high iron oxide content)
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)