Pyrite
Iron Disulfide (FeS2)
mineral
Category
Mineral And Sedimentary
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
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Specular Hematite
Hematite (Fe2O3)
mineral
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Stalagmite (Flowstone)
Speleothem (Calcium Carbonate, CaCO3)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Hematite Nodules (Moqui Marbles style)
Iron Oxide (Fe2O3)
mineral
Assorted Tumbled Gemstones
Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Fossil Shark Tooth
Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)
fossil
Gossan (Limonite/Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Red Jasper
Jasper (Silicate mineral - SiO2)
sedimentary
Abalone Shell (Nacre)
Aragonite (CaCO3) - Biogenic Mineral
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Gneiss
Gneiss
metamorphic
Sandstone (with potential fossil inclusions)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Limonite Concretion (Ironstone)
Limonite / Goethite (FeO(OH)·nH2O)
sedimentary
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
sedimentary
Magnetite / Ironstone Pebble
Magnetite (Fe3O4)
mineral
Magnetite (potentially Hematite)
Magnetite (Fe₃O₄)
mineral
Pyrite (Fools Gold)
Iron Disulfide (FeS2)
mineral
Satin Spar Selenite
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz (Small Pebble)
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Magnetite with Quartz
Magnetite (Fe3O4)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral