Rock Identifier

Category

Mineral Description (Anthropogenic Material)

Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.

Learn about Mineral Description (Anthropogenic Material) in the encyclopedia

Peat

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Milky Quartz with Hematite Staining (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Hematite Staining

Silicon Dioxide (SiO2)

Quartz geode / iron-stained quartz vein rock (Quartz (SiO₂), likely with iron oxides and minor feldspar or host-rock minerals) — mineral

Quartz geode / iron-stained quartz vein rock

Quartz (SiO₂), likely with iron oxides and minor feldspar or host-rock minerals

Amber (Succinite (C10H16O)) — mineral

Amber

Succinite (C10H16O)

Muscovite Mica (Muscovite (KAl2(AlSi3O10)(OH)2)) — mineral

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Fossilized tooth, likely mammalian molar (Indeterminate Mammalia; mineralized dentine and enamel) — fossil

Fossilized tooth, likely mammalian molar

Indeterminate Mammalia; mineralized dentine and enamel

Likely polished basalt with pale mineral inclusions (Basalt; inclusions possibly calcite, quartz, or weathered feldspar) — igneous

Likely polished basalt with pale mineral inclusions

Basalt; inclusions possibly calcite, quartz, or weathered feldspar

Tumbled red jasper (Jasper, microcrystalline quartz (SiO₂), commonly colored by iron oxides) — mineral

Tumbled red jasper

Jasper, microcrystalline quartz (SiO₂), commonly colored by iron oxides

Quartz with Mineral Inclusions (Silicon Dioxide (SiO2) with accessory minerals) — mineral

Quartz with Mineral Inclusions

Silicon Dioxide (SiO2) with accessory minerals

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Polished black-and-white banded stone, likely tourmalinated quartz or zebra jasper (Quartz (SiO₂) with black tourmaline (schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄), or quartz-rich zebra jasper) — mineral

Polished black-and-white banded stone, likely tourmalinated quartz or zebra jasper

Quartz (SiO₂) with black tourmaline (schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄), or quartz-rich zebra jasper

Rough turquoise-bearing rock (probable turquoise matrix) (Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, likely in a host-rock matrix) — mineral

Rough turquoise-bearing rock (probable turquoise matrix)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, likely in a host-rock matrix

Polished agate geode slice (Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide coloration) — mineral

Polished agate geode slice

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide coloration

Carborundum (Silicon Carbide) (Silicon Carbide (SiC)) — mineral

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Rough Diamond (Diamond (C)) — mineral

Rough Diamond

Diamond (C)

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)

Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Ocean Jasper Mushroom (Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)) — mineral

Ocean Jasper Mushroom

Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)

Quartz (Milky or Cloudy Quartz) (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz (Milky or Cloudy Quartz)

Quartz (Silicon Dioxide, SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Sandstone (with iron staining) (Quartz Arenite / Ferruginous Sandstone) — sedimentary

Sandstone (with iron staining)

Quartz Arenite / Ferruginous Sandstone

Sandstone (Red) (Arenite (primarily SiO2 with Fe2O3)) — sedimentary

Sandstone (Red)

Arenite (primarily SiO2 with Fe2O3)

Sandstone (Greywacke/Lithic Sandstone) (Clastic Sedimentary Rock (Lithic Sandstone)) — sedimentary

Sandstone (Greywacke/Lithic Sandstone)

Clastic Sedimentary Rock (Lithic Sandstone)

Bauxite (Bauxite (Al2O3·2H2O)) — sedimentary

Bauxite

Bauxite (Al2O3·2H2O)

Botryoidal hematite (speculative) (Hematite, iron(III) oxide (Fe₂O₃), possibly mixed with goethite or magnetite) — mineral

Botryoidal hematite (speculative)

Hematite, iron(III) oxide (Fe₂O₃), possibly mixed with goethite or magnetite

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — mineral

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Polished malachite tower (Malachite, Cu₂CO₃(OH)₂ (basic copper carbonate)) — mineral

Polished malachite tower

Malachite, Cu₂CO₃(OH)₂ (basic copper carbonate)

Seashell Fragment (Calcium Carbonate (CaCO3) in the form of Aragonite or Calcite) — mineral

Seashell Fragment

Calcium Carbonate (CaCO3) in the form of Aragonite or Calcite

Sandstone with Iron Weathering (Quartz Arenite / Weathered Sandstone) — sedimentary

Sandstone with Iron Weathering

Quartz Arenite / Weathered Sandstone

Petrified Wood (Silicified wood (primarily quartz, SiO2)) — fossil

Petrified Wood

Silicified wood (primarily quartz, SiO2)

Fossil Shark Tooth (Carcharadon sp. (likely Carcharodon carcharias or similar Lamniformes)) — fossil

Fossil Shark Tooth

Carcharadon sp. (likely Carcharodon carcharias or similar Lamniformes)

Quartz (Milky or Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Iron-Stained)

Silicon Dioxide (SiO2)

Quartz Vein in Sandstone (Quartz (SiO2) in Clastic Sedimentary Rock) — sedimentary

Quartz Vein in Sandstone

Quartz (SiO2) in Clastic Sedimentary Rock

Travertine (Calcium Carbonate (CaCO3)) — sedimentary

Travertine

Calcium Carbonate (CaCO3)

Fulgurite (Fulgurite (Lechatelierite / Vitreous Silica)) — mineral

Fulgurite

Fulgurite (Lechatelierite / Vitreous Silica)

Chalcedony (Fire Agate or Carnelian variety) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Chalcedony (Fire Agate or Carnelian variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Red Sandstone (Arenite with iron oxide (Hematite) cement) — sedimentary

Red Sandstone

Arenite with iron oxide (Hematite) cement

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Quartz (Chert/Quartzite) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chert/Quartzite)

Silicon Dioxide (SiO2)

Quartz Crystal Cluster (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Crystal Cluster

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)