Graphite
Carbon (C)
mineral
Category
Mineral And Sedimentary
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
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Graphite
Graphite (Carbon, C)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Banded Jasper (Mookaite / Chert)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
sedimentary
Sandstone
SiO2 (predominantly quartz sand)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Yellow Chalcedony / Yellow Agate
Silicon Dioxide (SiO2)
mineral
Satin Spar (Satin Spar Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Fragmented Sedimentary Pebble
Clastic Sedimentary Specimen
sedimentary
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Limonite Geode / Ironstone Nodule
Hydrated Iron Oxide Hydroxide (FeO(OH)·nH2O)
mineral
Weathered Sandstone Cobble
Arenite / Quartz Sandstone
sedimentary
Shale
Shale (Fine-grained clastic sedimentary rock)
sedimentary
Limonite on Sandstone
Iron Oxyhydroxide (FeO(OH)·nH2O) on Quartz Sandstone
sedimentary
Orange Calcite (likely polished specimen)
Calcite
Mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Banded Sedimentary Rock
Sedimentary rock with Liesegang banding
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (lithic)
Lithic Wacke / Arenite
sedimentary
Shale
Lutaceous sedimentary rock
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone and Conglomerate pebbles
Sedimentary clastic rock
sedimentary
Pyrite
Iron Pyrite (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite cluster (iron pyrite)
Pyrite, FeS₂
mineral
Sandstone Pebble
Sandstone (primarily SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Graphite
Graphite (Carbon, C)
mineral
Feldspar
Triclinic or Monoclinic Tectosilicate (e.g., KAlSi3O8)
mineral
Shale with Iron Staining
Fissile Mudrock (Sedimentary Rock)
sedimentary
Magnetite / Ironstone
Magnetite (Fe3O4)
mineral
K-Feldspar (Potassium Feldspar)
Orthoclase / Microcline (KAlSi3O8)
mineral
Shale
Shale (claystone/mudstone)
sedimentary