Basalt
Mafic Volcanic Rock (composed of Plagioclase Feldspar and Pyroxene)
Category
Browse anthropic metallic specimen specimens identified by the Rock Identifier community.
Basalt
Mafic Volcanic Rock (composed of Plagioclase Feldspar and Pyroxene)
Anthracite Coal
Anthracite
Basalt with Scoria/Vesicular Texture
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
Michigan Float Copper
Native Copper (Cu)
Meteorite (Chondrite)
L6 Ordinary Chondrite
Chondrite Meteorite
Ordinary Chondrite (L or H type)
Schist
Mica Schist
Ammonite Fossil
Ammonoidea (primarily composed of Calcite, CaCO3, or Pyrite)
Schist
Mica Schist
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Hematite/Goethite shell with Sandstone core)
Schist
Mica Schist
Fluorite
Calcium Fluoride (CaF2)
Chondrite Meteorite
Ordinary Chondrite (Undifferentiated Stony Meteorite)
Schist
Mica Schist (Medium-grade Metamorphic Rock)
Pyrite
Iron Sulfide (FeS2)
Hematite
Iron(III) oxide (Fe2O3)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Galena
Lead(II) sulfide (PbS)
Basalt
Basalt (Aphanitic-to-porphyritic mafic volcanic rock)
Moqui Marble (Shaman Stone)
Ironstone Concretion (Fe2O3 - Hematite/Goethite shell with Sandstone core)
Smoky Quartz and Biotite Schist
Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)
Mica Schist
Mica Schist
Vesicular Basalt
Mafic Igneous Rock
Banded Iron Formation (BIF) / Jasper-Magnetite
Banded Iron Formation (majorly Fe2O3/Fe3O4 + SiO2)
Basalt
Basalt (Aphanitic Igneous Rock)
Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
Mica Schist
Mica Schist (primarily Muscovite and Quartz composition)
Schist
Mica Schist
Chondrite Meteorite (Possibility)
Stony Meteorite (Chondrite)
Basalt
Extrusive mafic igneous rock
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
Quartzite (Yellow/Iron-stained Quartz)
Quartzite (primarily SiO2 with iron oxide impurities)
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Mica Schist
Mica Schist (Intermediate-grade Metamorphic Rock)
Schorl (Black Tourmaline) in Granite
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Fluorite
Calcium Fluoride (CaF2)
Mica Schist
Crystalline Schist (often primarily Muscovite or Biotite sheet silicates)
Basalt
Basalt (Mafic Extrusive Igneous Rock)
Schist
Mica Schist