Tiny rounded metallic-looking pebble, possibly pyrite or a metal-rich mineral
Uncertain from image; possible pyrite (FeS₂), chalcopyrite (CuFeS₂), or magnetite (Fe₃O₄)
mineral
Category
Sedimentary Mineral
Browse sedimentary mineral specimens identified by the Rock Identifier community.
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Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Chert / Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (Banded)
Clastic Sedimentary Rock: Arenite
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (Felsic to Mafic Metamorphic Rock)
metamorphic
Magnetite (Lodestone variant potential)
Magnetite (Fe3O4)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Satin Spar (Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Satin Spar (Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Jasper with Purple Fluorite or Chalcedony
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Sandstone (with Limonite staining)
Arenite (primarily SiO2 with FeO(OH)·nH2O)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Shale
Sedimentary pelitic rock
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock), SiO2 + various minerals
sedimentary
Sandstone (Iron-stained)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Bivalve Seashell Fossil
Class Bivalvia
fossil
Banded sandstone pebble
Quartz-rich sandstone, likely iron-oxide- and organic/mineral-stained; exact variety uncertain
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Disulfide (FeS2)
Mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Barite
Barium Sulfate (BaSO4)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Graphite
Graphite (Carbon, C)
mineral
Hematite
Hematite (Fe2O3)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Shale
Mudrock / Fissile Shale
sedimentary
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Polished Hematite Tower
Hematite (Fe2O3)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Shale (with Iron Staining)
Argillaceous mudstone / Shale
sedimentary