Goethite/Hematite Nodule
Goethite (FeO(OH)) and Hematite (Fe2O3)
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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Gold Nugget / Native Gold
Native Gold (Au)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper with Iron Oxides
Silicon Dioxide (SiO2) with Fe2O3 inclusions
sedimentary
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Limonite (Ironstone)
Goethite/Limonite (Hydrated iron(III) oxide-hydroxide)
mineral
Green Calcite (Onyx Marble)
Carbonate mineral (Calcium Carbonate, CaCO3)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (lithic or quartz sandstone)
sedimentary
Quartz (Jasper / Chert)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Agate/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Celestite (Celestine) Druze on Agate/Host Rock
Strontium sulfate (SrSO4)
mineral
Emerald
Beryl (Be₃Al₂(SiO₃)‑₆) with Chromium/Vanadium impurities
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Howlite
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Green Sandstone
Glauconitic Sandstone
sedimentary
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
mineral
Quartz / Chalcedony
Silicon Dioxide (SiO2)
mineral
Ironstone Nodules (Iron Concretion)
Siderite or Hematite Concretion
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Aragonite (Flos Ferri)
Calcium Carbonate (CaCO3)
mineral
Sandstone Concretion
Moqui Marble / Iron-oxide Concretion (SiO2 with Hematite/Goethite)
sedimentary
Pink Calcite
Calcium Carbonate (CaCO3)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Chalcedony (Agate/Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Yellow / Citrine Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Sandstone (Glacial Cobble)
Arenite / Sedimentary Rock (primarily SiO2)
sedimentary
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite Geode / Ironstone Concretion with Quartz
Limonite with Quartz (FeO(OH)·nH2O + SiO2)
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Poppy Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone Pebble
Sandstone (Siliciclastic Sedimentary Rock)
sedimentary
Jasper
Silicon Dioxide (SiO2)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral