Leland Blue Stone
Anthropogenic Iron Smelting Slag
mineraloid
Category
Mineral Precipitate (Anthropogenic Context)
Browse mineral precipitate (anthropogenic context) specimens identified by the Rock Identifier community.
Learn about Mineral Precipitate (Anthropogenic Context) in the encyclopedia
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Slag (Industrial Byproduct)
Anthropogenic Vitreous Silicate material
igneous
Ferruginous Quartzite (also known as Ironstone or Gossan)
Ferruginous Quartzite with Goethite/Hematite staining
metamorphic
Jasper with Iron Staining
Silicon Dioxide (SiO2) with impurities
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Slag
Anthropogenic Vitreous Silica/Iron oxides
mineral-like byproduct
Chert (specifically Flint or Dark Chert)
Silicon Dioxide (SiO2)
sedimentary
Gossan (Iron Hat) with Quartz and Chlorite
Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite
Mineral/Metamorphic Substrate
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
sedimentary
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Green Quartzite (Aventurine-like)
Quartzite (primarily SiO2 with chromium-rich mica or chlorite inclusions)
metamorphic
Glass / Silicon Dioxide (Man-made)
SiO2 (Amorphous Silicon Dioxide)
Amorphous Solid
Granite Pebble
Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)
igneous
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
sedimentary
Concrete / Conglomerate (Man-made)
Artificial Conglomerate (Cementitious Composite)
sedimentary
Granodiorite
Granodiorite
igneous
Iron Slag
Anthropogenic Iron oxide/Silicate composite
Mineral-like byproduct (Technogenic)
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Arrowhead Shard)
Microcrystalline silica (SiO2)
sedimentary
Serpentinite
Serpentinite (containing minerals of the Serpentine subgroup: Antigorite, Lizardite, and Chrysotile; formula (Mg,Fe)3Si2O5(OH)4)
metamorphic
Painted River Pebble (likely Basalt or Greywacke)
Aphanitic Lithic Clast with Anthropogenic Pigment coating
Sedimentary or Igneous
Sandstone (Ferruginous)
Arenite (SiO2 based with Fe2O3 banding)
sedimentary
Chert (with nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Opaque microcrystalline Quartz (SiO2 with Fe2O3 inclusions)
sedimentary
Psilomelane (Black Hematite varietal)
Barium Manganese Oxide (Ba,H2O)2Mn5O10
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Limonite / Ironstone
Hydrated ferric oxide (FeO(OH)·nH2O)
mineral
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Magnetite
Magnetite (Fe3O4)
Mineral
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Pyrite
Pyrite (FeS₂)
Mineral
Ferruginous Sandstone (Ironstone Conglomerate fragments)
Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)
sedimentary
Black Star Diopside
Diopside (CaMgSi2O6) with Magnetite inclusions
mineral
Hematite (likely Botryoidal or Specularite variant)
Iron(III) oxide (Fe2O3)
mineral
Native Copper Nugget
Native Copper (Cu)
mineral
Limestone with Quartz or Calcite Veining
Calcium Carbonate (CaCO3) matrix with SiO2 or CaCO3 inclusions
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Graywacke
Graywacke
sedimentary