Basalt with Iron Oxidation
Mafic Igneous Basalt
Category
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
Basalt with Iron Oxidation
Mafic Igneous Basalt
Septarian Nodule
Septarian Concretion (CaCO3-rich mudstone with Calcite/Aragonite veins)
Granite
Intrusive Phaneritic Felsic Igneous Rock
Limestone
Calcium Carbonate (CaCO3)
Schist
Mica Schist (Metamorphic Rock)
Pink Granite (Unakite-bearing or Epidote-bearing Granite)
Plutonic Igneous Rock (Granite)
Picture Jasper
Silicon Dioxide (SiO2) with impurities
Sandstone with Foliose Lichen
Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)
Milky Quartz Chip
Silicon Dioxide (SiO2)
Sandstone
Arenite (Sandstone)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (composed mostly of SiO2)
Sandstone
Arenite (SiO2 predominantly)
Basalt
Basalt
Green Quartz
Silicon Dioxide (SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone (Red Sandstone / River Stone)
Arenite (composed primarily of Quartz, SiO2, with Iron Oxide cementation)
Sandstone
Arenite (primarily SiO2)
Chert (Jasper/Flint Pebble)
Microcrystalline quartz (SiO2)
Citrine (Heat-treated Amethyst)
Silicon Dioxide (SiO2) with iron impurities
Quartz (Smoky/Milky Variety)
Silicon Dioxide (SiO2)
Quartz (Gray or Smoky variety)
Silicon Dioxide (SiO2)
Citrine
Silicon Dioxide (SiO2) with ferric iron impurities
Sandstone (Quartzose)
Arenite (primarily SiO2)
Bauxite
Bauxite (Al2O3·nH2O)
Yellow Quartz (Citrinated Quartz)
Silicon Dioxide (SiO2)
Smoky Quartz (Rough Specimen)
Silicon Dioxide (SiO2)
Ferruginous Quartz
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3/FeO(OH))
Botryoidal Chalcedony / Quartz
Silicon Dioxide (SiO2)
Granitic Pegmatite
Pegmatite
Basalt River Cobble
Basalt (Aphanitic Mafic Volcanic Rock)
Sandstone
Quartz Arenite / Clastic Sedimentary Rock
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
Moss Agate
SiO2 with impurities (Chalcedony)
Quartz Geode with Iron Oxide
Silicon Dioxide (SiO2) with Hematite/Goethite coatings
Sandstone (Weathered Pebble)
Sedimentary Rock (Quartz arenite)
Petrified Wood
Silicified Wood / Xylopal (SiO2)
Amethyst Geode Fragment
Quartz (SiO2) with trace iron impurities
Sandstone
Arenite
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Mica Schist
Mica Schist
Red Sandstone
Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)