Rock Identifier

Category

Anthropogenic (Man Made)

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

Learn about Anthropogenic (Man Made) in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Zincite

Lherzolite

Gondite

Dunite

Likely tumbled dark volcanic rock (Probably basalt or basaltic andesite; exact identification is uncertain from the image) — igneous

Likely tumbled dark volcanic rock

Probably basalt or basaltic andesite; exact identification is uncertain from the image

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (River Pebble) (Calcite (Calcium Carbonate) - CaCO3) — sedimentary

Limestone (River Pebble)

Calcite (Calcium Carbonate) - CaCO3

Granite (Granite) — igneous

Granite

Granite

Pink Granite (Fragment) (Pink Granite (dominated by Potassium Feldspar: KAlSi3O8)) — Igneous

Pink Granite (Fragment)

Pink Granite (dominated by Potassium Feldspar: KAlSi3O8)

Milky Quartz (Silicon dioxide (SiO2)) — mineral

Milky Quartz

Silicon dioxide (SiO2)

Specular Hematite (Iron Ore) (Iron(III) oxide (Fe2O3)) — mineral

Specular Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartz (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz

Quartz (SiO2 - Silicon Dioxide)

Granite (Phaneritic plutonic rock (Quartz, Feldspar, Mica)) — igneous

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Sandstone (likely Fossiliferous) (Arenite / Sedimentum arenaceum) — sedimentary

Sandstone (likely Fossiliferous)

Arenite / Sedimentum arenaceum

Chert (Fossiliferous) (Silicon dioxide (SiO2)) — sedimentary

Chert (Fossiliferous)

Silicon dioxide (SiO2)

Basalt (Fine-grained mafic volcanic rock, chiefly plagioclase feldspar, pyroxene, and commonly olivine) — igneous

Basalt

Fine-grained mafic volcanic rock, chiefly plagioclase feldspar, pyroxene, and commonly olivine

Granite (Intrusive Phaneritic Felsic Igneous Rock) — igneous

Granite

Intrusive Phaneritic Felsic Igneous Rock

Basalt (Basalt) — igneous

Basalt

Basalt

Sandstone (Ferruginous) (Arenite (Fe2O3 rich)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe2O3 rich)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Sandstone (Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)) — Sedimentary Rock

Sandstone

Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)

Sedimentary Rock

Schist (N/A (a rock type, not a mineral formula)) — metamorphic

Schist

N/A (a rock type, not a mineral formula)

Weathered pegmatite or feldspar-rich granite fragment (Granitic pegmatite, composed mainly of potassium feldspar and quartz, with minor mica; exact identification is uncertain from the photograph) — igneous

Weathered pegmatite or feldspar-rich granite fragment

Granitic pegmatite, composed mainly of potassium feldspar and quartz, with minor mica; exact identification is uncertain from the photograph

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Granite Pebble (Granite (Felsic Intrusive Igneous Rock)) — igneous

Granite Pebble

Granite (Felsic Intrusive Igneous Rock)

Quartz (Float/Abraded) (Quartz (SiO₂)) — Mineral

Quartz (Float/Abraded)

Quartz (SiO₂)

Pink Granite (Granite (Phaneritic igneous rock rich in Alkali Feldspar)) — igneous

Pink Granite

Granite (Phaneritic igneous rock rich in Alkali Feldspar)

Sandstone (Ferruginous) (Ferruginous Sandstone (SiO2 with iron oxide cement)) — sedimentary

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with iron oxide cement)

Polished basalt (vesicular basalt pebble) (Basalt, primarily plagioclase feldspar and pyroxene, commonly with olivine and iron oxides) — igneous

Polished basalt (vesicular basalt pebble)

Basalt, primarily plagioclase feldspar and pyroxene, commonly with olivine and iron oxides

Granite (Granite (Phaneritic Quartz-Feldspar Rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar Rock)

Scoria (Scoriaceous Basalt) — igneous

Scoria

Scoriaceous Basalt

Pink Granite (Phaneritic Felsic Igneous Rock) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock

Sandstone (lithic) (Lithic Wacke / Arenite) — sedimentary

Sandstone (lithic)

Lithic Wacke / Arenite

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Chert (also known as Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (also known as Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Basalt (Water-worn Pebble) (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt (Water-worn Pebble)

Basalt (Aphanitic Mafic Igneous Rock)

Carnelian (Carnelian Chalcedony (SiO2)) — mineral

Carnelian

Carnelian Chalcedony (SiO2)

Quartz-rich vein rock, likely milky quartz in weathered host rock (Milky quartz (SiO₂), probably with weathered feldspar and iron-oxide staining) — igneous

Quartz-rich vein rock, likely milky quartz in weathered host rock

Milky quartz (SiO₂), probably with weathered feldspar and iron-oxide staining