Vesicular Basalt
Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 (Pyroxene) and (Ca,Na)Al(Al,Si)Si2O8 (Plagioclase Feldspar)
igneous
Category
Anthropic Metallic Specimen
Browse anthropic metallic specimen specimens identified by the Rock Identifier community.
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Limonite (Iron Ore)
Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O
mineral
Pyrite on Limestone
Iron Disulfide (FeS2) in Calcium Carbonate (CaCO3) matrix
sedimentary (matrix) / mineral (inclusion)
Chalcopyrite
Chalcopyrite (CuFeS2)
Mineral
Basalt
Mafic volcanic rock (Silicon dioxide 45-52%)
igneous
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Blue Aventurine
Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions
mineral
Galena
Lead Sulfide (PbS)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Mica Schist
Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)
metamorphic
Sandstone Moqui Marble (Concretion)
Iron oxide concretion (Hematite/Goethite and Quartz)
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Banded Iron Formation (Hematite/Magnetite-rich)
Banded Iron Formation (BIF)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Anthracite Coal
Anthracite
metamorphic
Galena
Lead(II) sulfide (PbS)
mineral
Mica Schist
Foliated Metamorphic Rock (Schist)
metamorphic
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral
Anthracite Coal
Anthracite (Carbon-based solid)
metamorphic
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Labradorite
Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8
mineral
Chondrite Meteorite
L or H type Ordinary Chondrite
igneous
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS)
mineral
Basalt Cobble
Aphanitic Mafic Igneous Rock (Basalt)
igneous
Schist
Mica Schist
metamorphic
Anthracite
Anthracite Coal
sedimentary
Anthracite Coal
Anthracite
metamorphic
Native Gold
Native Gold (Au)
mineral
Dendrite (Manganese Oxide Dendrites)
Psilomelane or Pyrolusite on Matrix (typically MnO2)
mineral
Basalt with Porphyritic Texture
Porphyritic Basalt
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Basalt
Extrusive mafic igneous rock
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Basalt
Basalt
igneous
Pyrite
Iron Disulfide (FeS2)
Mineral