Goethite (Iron Ore)
Goethite (FeO(OH))
mineral
Category
Mineral, Often Found In Sedimentary Deposits
Browse mineral, often found in sedimentary deposits specimens identified by the Rock Identifier community.
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Blue Calcite Sphere
Calcium Carbonate (CaCO3)
mineral
Fossil Bone Fragment
Petrified bone (permineralized hydroxyapatite)
fossil
Chalcopyrite
Chalcopyrite (CuFeS2)
Mineral
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Limonite (often after Hematite or Goethite)
Limonite (FeO(OH)·nH2O)
mineral
Banded Basalt with Sandstone Vein
Basalt with sedimentary intrusion
igneous
Sandstone
Arenite
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Halite
Halite (Sodium Chloride, NaCl)
mineral
Jasper
Microcrystalline quartz (SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Likely galena-bearing rock fragment
Galena (PbS), possibly in a quartz- or carbonate-rich matrix
mineral
Quartz with Sulfides
Silicon Dioxide (SiO2) with accessory minerals
mineral
Celestine Geode
Strontium Sulfate (SrSO4)
mineral
Chalcedony (specifically Agate or Carnelian)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Howlite
Ca2B5SiO9(OH)5
mineral
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
mineral
Limonite Boxwork / Iron Ore Concretion
FeO(OH)qnH2O (Hydrated iron oxide)
sedimentary
Limonite Concretion
Hydrated iron oxide-hydroxide, FeO(OH)·nH2O
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Barite Rose
Barium Sulfate (BaSO4)
mineral
Boji Stone
Polished iron pyrite and marcasite concretions
mineral
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Carnelian Agate
Chalcedony (SiO2)
mineral
Native Gold (in earring form)
Gold (Au)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Specular Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Likely galena (lead ore)
Galena, PbS (lead sulfide)
mineral
Jasper Beads
Microcrystalline Quartz (SiO2)
sedimentary
Geode with Quartz Crystals
SiO2 (Silicon Dioxide) in a geode formation
Sedimentary/Igneous (depending on host rock)
Limonite
Hydrous ferric oxides (FeO(OH)·nH2O)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Banded Calcite
CaCO3
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral