Limonite Concretion
Limonite (FeO(OH)·nH2O) Pseudomorph
Category
Browse mineral on sedimentary specimens identified by the Rock Identifier community.
Limonite Concretion
Limonite (FeO(OH)·nH2O) Pseudomorph
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Ironstone Concretion / Limonite-stained Siltstone
Ironstone (primarily Limonite FeO(OH)·nH2O and Siltstone)
Banded sandstone pebble
Quartz-rich sandstone, likely iron-oxide- and organic/mineral-stained; exact variety uncertain
Limonite Geode / Ironstone Concretion
Hydrated iron oxide-hydroxide (FeO(OH)·n H2O)
Quartz Vein in Sedimentary Rock
Silicon Dioxide (SiO2) with host Chert or Limestone
Bivalve Seashell Fossil
Class Bivalvia
Quartz pebble
Silicon dioxide (SiO2)
Hematite
Hematite (Fe2O3)
Blue Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)
Yellow Calcite
Calcium Carbonate (CaCO3)
Quartz (Chert / Agate / Chalcedony)
Silicon Dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Sedimentary Rock with Crafts (Pet Rock)
Sedimentary rock decorated with synthetic materials
Quartz pebble
Silicon dioxide (SiO2)
Mixed Gemstone and Mineral Collection
Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)
Celestite
Celestine (SrSO4)
Shale
Sedimentary pelitic rock
Limonite
FeO(OH)•nH2O
Sandstone
Arenite (primarily composed of SiO2)
Sandstone
Arenite
Shale
Shale (Lutite)
Sandstone (Banded)
Sedimentary Clastic Rock
Weathered brown rock, likely sandstone or iron-rich sedimentary stone
Indeterminate siliciclastic rock; likely quartz-rich sandstone with iron-oxide cement
Calcite
Calcium Carbonate (CaCO3)
Brachiopod Fossil in Limestone
Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)
Sandstone
Clastic Sedimentary Rock
Shale or Mudstone River Pebble
Argillaceous sedimentary rock
Red Sandstone
Arenite (SiO2 with Fe2O3)
Sandstone (River Cobble / Pebble)
Sedimentary Rock (Quartz Sandstone / Arenite)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide cement)
White Howlite (likely)
Howlite, Ca₂B₅SiO₉(OH)₅
Blue Calcite
Calcium Carbonate (CaCO3)
Limonite
FeO(OH)•nH2O
Botryoidal Goethite
Goethite (α-Fe3+O(OH))
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
Sandstone
Clastic sedimentary rock
Sandstone / Quartzite
Sedimentary quartz arenite
Shale
Argillaceous sedimentary rock
Ironstone concretion
Iron-oxide-cemented sedimentary concretion, commonly hematite/goethite with quartz or clay