Limonite
Limonite (FeOO·nH2O)
mineral
Category
Mineral On Sedimentary
Browse mineral on sedimentary specimens identified by the Rock Identifier community.
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Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
metamorphic
Fish Fossil in Limestone
Lycoptera (likely) in Micritic Limestone
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Cleavable Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Optical Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Geode or Concretion
Silica-filled nodule (likely SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) within a geode
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (with Iron Oxide)
Quartz Arenite / Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Sandstone or Quartzite
Arenite (if sedimentary) / Quartzite (if metamorphic)
Sedimentary or Metamorphic
Milky quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz (likely quartz vein fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Quartz pebble
SiO2
mineral
Blue calcite (probable)
Calcite, calcium carbonate (CaCO₃)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Breciated Limestone with Calcite Veins
Sedimentary Breccia (CaCO3)
sedimentary
Limonite or Ironstone Nodule
Hydrated iron oxide-hydroxide (FeO(OH)·nH2O)
mineral
Limonite Nodule
FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)
mineral
Limonite
FeO(OH)·nH2O
mineral
Jasper with Quartz Vein
Silicon Dioxide (SiO2)
sedimentary
Yellow Ochre (Limonite)
Limonite (FeO(OH)qnH2O)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz Geode
SiO2 (Silicon Dioxide)
sedimentary
Quartz (Orange/Pink variety)
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
Limonite; FeO(OH)·nH2O
mineral
Sandstone (Iron-stained)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Banded)
Sedimentary Clastic Rock
sedimentary
Green Jasper Pebble
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Sandstone
Arenite (SiO2 composition primarily)
sedimentary
Sandstone with Iron Staining
Arenite (SiO2 with FeO(OH) impurities)
sedimentary
Layered shale or mudstone fragment
Fissile claystone/mudstone, commonly clay minerals with quartz and minor iron oxides
sedimentary