Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Category
Mineral And Sedimentary
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
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Sandstone
Arenite (primarily SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
mineral
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Iron Oxide cement)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Limonite or Ironstone Nodule
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
sedimentary
Sandstone with Manganese Dendrites
Arenite (mostly SiO2) with Manganese Oxide inclusions (MnO2)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
metamorphic
Sandstone (likely Graywacke or Siltstone variety)
Clastic Sedimentary Rock (SiO2 with assorted mineral fragments)
sedimentary
Sandstone (likely Arkose or Lithic)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Claystone Concretion
Septarian Concretion (Ironstone-rich)
sedimentary
Educational Geologic Collection
Mixed Mineral and Rock Collection (Various compositions)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron impurities
mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Shale or Mudstone River Pebble
Argillaceous sedimentary rock
sedimentary
River Stones (Quartzite and Sandstone)
Quartzite / Sedimentary Rock (SiO2 dominant)
sedimentary
Banded River Stone (Greywacke or Siltstone subtype)
Sedimentary Banded Siltstone
sedimentary
Sandstone with Iron Staining
Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))
sedimentary
Ironstone Concretion (Limonite/Goethite)
Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)
sedimentary
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Sandstone (Ferruginous)
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Magnetite
Magnetite (Fe3O4)
mineral
Red Sandstone (Iron-stained)
Clastic sedimentary rock (primarily Quartz with Iron Oxides)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sedimentary Pebble (Sandstone)
Clastic Sedimentary Rock (SiO2 dominant)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Fossilized Bivalve Shell
Bivalvia (fossil specimen)
sedimentary
Sandstone with Iron Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
mineral
Sandstone (Banded)
Arenite
sedimentary
Geode (Unopened)
Silica-rich concretion (SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Ironstone (Limonite/Hematite)
Ferruginous sedimentary rock (Fe2O3·nH2O / Fe2O3)
sedimentary
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Native Copper (Penny specimen)
Native Copper (Cu)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
Limonite (Iron Ore)
Limonite (Iron oxide-hydroxide mixture, FeO(OH)·nH2O)
mineral
Banded Onyx (Mexican Onyx / Travertine)
Calcite (CaCO3) - Banded Travertine
sedimentary
Specular Hematite
Hematite (Fe2O3)
mineral