Limonite Concretion
Goethite/Limonite concretion (FeO(OH)·nH2O)
sedimentary
Category
Sedimentary (Chemically Precipitated Mineral)
Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Chemically Precipitated Mineral) in the encyclopedia
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Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Bauxite
Aluminium ore / Hydrated aluminium oxides (AlOx(OH)3-2x)
sedimentary
Kaolinite (Kaolin)
Kaolinite (Al2Si2O5(OH)4)
mineral
Limonite Concretion
FeO(OH)qnH2O (Hydrated iron(III) oxide-hydroxide mixture)
sedimentary
Chert (Polished River Pebble)
Chert (SiO2)
sedimentary
Calcite
Calcium Carbonate (CaCO3)
mineral
Kaolinite (Chalky Clay)
Kaolinite (Al2Si2O5(OH)4)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
sedimentary
Chert Nodule (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Flint Nodules)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony
Chalcedony (a microcrystalline variety of Quartz, SiO2)
Mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Limonite (Ironstone Concretion)
Limonite: FeO(OH)·nH2O
sedimentary
Yellow Calcite / Banded Onyx Calcite
Calcite (CaCO3)
mineral
Quartz (Yellow/Iron-stained Quartzite or Chalcedony)
Silicon Dioxide (SiO2)
mineral
Optical Calcite (Iceland Spar)
Calcite (CaCO3)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Banded Sedimentary Rock
Sedimentary rock with Liesegang banding
sedimentary
Ferruginous Sandstone with Concretion
Sandstone (SiO2 dominated with Fe2O3 cement)
sedimentary
Banded Iron Formation (Chert/Jasper)
Banded Iron Formation (BIF)
sedimentary
Bog Iron (Limonite Concretion)
Limonite (FeO(OH)·nH2O)
sedimentary
Sandstone with Iron Staining
Arenite (SiO2 based with Fe2O3 staining)
sedimentary
Septarian Nodule
Septarian concretion (Complex mixture of Siderite/Limestone, Calcite, and Aragonite)
sedimentary
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
mineral
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Pink Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Septarian Nodule with Calcite
Septarian Concretion (CaCO3 with internal calcite crystals)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with goethite or iron oxide inclusions
sedimentary