Rock Identifier

Category

Anthropogenic (Man Made Material)

Browse anthropogenic (man made material) specimens identified by the Rock Identifier community.

Learn about Anthropogenic (Man Made Material) in the encyclopedia

Opalite

Goldstone

Peat

Map Jasper

Blue Goldstone

Mandarin Garnet

Mandarin Garnet

Dunite

Andalusite

Zincite

Marl

Limonite

Diamond

Tumbled amethyst (Quartz, SiO₂; purple variety colored mainly by trace iron and irradiation) — mineral

Tumbled amethyst

Quartz, SiO₂; purple variety colored mainly by trace iron and irradiation

Tumbled green aventurine (Quartz (SiO₂), commonly containing fuchsite mica inclusions) — mineral

Tumbled green aventurine

Quartz (SiO₂), commonly containing fuchsite mica inclusions

Amethyst quartz cluster (Quartz, SiO₂; purple color caused mainly by iron-related defects and irradiation) — mineral

Amethyst quartz cluster

Quartz, SiO₂; purple color caused mainly by iron-related defects and irradiation

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Black Obsidian (Volcanic Glass (SiO2 with impurities)) — igneous

Black Obsidian

Volcanic Glass (SiO2 with impurities)

Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon Dioxide (SiO2)

Diamond (C (Native Carbon)) — mineral

Diamond

C (Native Carbon)

Diamond (in Matrix) (Carbon (C)) — mineral

Diamond (in Matrix)

Carbon (C)

Libyan Desert Glass (Impactite (vitreous silica), SiO2) — mineral

Libyan Desert Glass

Impactite (vitreous silica), SiO2

Chrysocolla (Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)) — mineral

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)

Diamond (Faceted) (Carbon (C)) — mineral

Diamond (Faceted)

Carbon (C)

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

Diamond

Diamond (pure carbon, C)

Aragonite Star Cluster (Aragonite (Calcium Carbonate, CaCO3)) — mineral

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

Green Sandstone (Glauconitic Sandstone) (Glauconitic Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)) — sedimentary

Green Sandstone (Glauconitic Sandstone)

Glauconitic Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)

Sodalite beads (Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, likely with minor lazurite/pyrite or calcite inclusions) — mineral

Sodalite beads

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, likely with minor lazurite/pyrite or calcite inclusions

Polished red jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides) — mineral

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Chert (Chert (Microcrystalline Silica, SiO2)) — sedimentary

Chert

Chert (Microcrystalline Silica, SiO2)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Limestone (Calcium carbonate (CaCO3)) — sedimentary

Limestone

Calcium carbonate (CaCO3)

Chert (varietal Flint) (Chert (SiO2)) — sedimentary

Chert (varietal Flint)

Chert (SiO2)

Jasper (Silicon dioxide (Quartz variety), SiO2) — sedimentary

Jasper

Silicon dioxide (Quartz variety), SiO2

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

Fulgurite

Fulgurite (Lechatelierite/Silica glass)

Fossil Shell (Brachiopod or Mollusk fossil) — fossil

Fossil Shell

Brachiopod or Mollusk fossil

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Fossil Shark Tooth (Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)) — fossil

Fossil Shark Tooth

Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)

Chert (Jasper variation) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

Chert (or Chalcedony) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (or Chalcedony)

Microcrystalline Quartz (SiO2)

Limonite (Ironstone) (Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))) — mineral

Limonite (Ironstone)

Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))

Chert (Chalcedony/Common Opal) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chalcedony/Common Opal)

Microcrystalline Quartz (SiO2)

Jasper Agate (Silicon dioxide (SiO2)) — mineral

Jasper Agate

Silicon dioxide (SiO2)

Limonite (Iron Ore) (Limonite (Hydrous iron(III) oxide-hydroxide mixture, primarily FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (Hydrous iron(III) oxide-hydroxide mixture, primarily FeO(OH)·nH2O)

Jasper (Nephrite-like appearance) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (Nephrite-like appearance)

Silicon Dioxide (SiO2) with impurities

Pyrite (Fool's Gold) Cube (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold) Cube

Iron Sulfide (FeS2)

Fossiliferous Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone

Calcium Carbonate (CaCO3)

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — Mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

River Stone (Greywacke) (Greywacke (immature sandstone)) — sedimentary

River Stone (Greywacke)

Greywacke (immature sandstone)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Sedimentary Rock (Quartz arenite/Arkose)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite/Arkose)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Sandstone (Sandstone (Arenite)) — sedimentary

Sandstone

Sandstone (Arenite)