Rock Identifier

Category

Industrial Byproduct (Anthropogenic Material)

Browse industrial byproduct (anthropogenic material) specimens identified by the Rock Identifier community.

Learn about Industrial Byproduct (Anthropogenic Material) in the encyclopedia

Adirondack Garnet

Adirondack Garnet

Peat

Almandine Garnet

Almandine Garnet

Dunite

Limonite

Shell Opal

Madagascar Opal

Lavender Obsidian

Electric Blue Obsidian

Orange Obsidian

Diamond

Metarhyolite

White quartz-rich pebble (Likely quartzite or milky-quartz pebble (SiO₂)) — mineral

White quartz-rich pebble

Likely quartzite or milky-quartz pebble (SiO₂)

Amethyst (purple quartz) (Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation) — mineral

Amethyst (purple quartz)

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Iron-stained quartz-rich rock, possibly quartzite or hydrothermal quartz (Quartz (SiO₂), likely with iron oxides; exact host rock uncertain from the photograph) — metamorphic

Iron-stained quartz-rich rock, possibly quartzite or hydrothermal quartz

Quartz (SiO₂), likely with iron oxides; exact host rock uncertain from the photograph

Peridot (Olivine) (Magnesium Iron Silicate (Mg, Fe)2SiO4) — mineral

Peridot (Olivine)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Specular Hematite (Specularite) (Iron Oxide (Fe2O3)) — mineral

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Peridot (Olivine) (Magnesium Iron Silicate (Mg,Fe)2SiO4) — gemstone

Peridot (Olivine)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Orange Quartzita (Calcite-stained Quarzite) (Metamorphic Silicon Dioxide (SiO2) with iron/calcium inclusions) — metamorphic

Orange Quartzita (Calcite-stained Quarzite)

Metamorphic Silicon Dioxide (SiO2) with iron/calcium inclusions

Pegmatite (Granitic) (Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)) — igneous

Pegmatite (Granitic)

Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)

Schist (Mica Schist (Medium-grade Metamorphic Rock)) — Metamorphic

Schist

Mica Schist (Medium-grade Metamorphic Rock)

Ruby (Corundum) (Aluminum oxide (Al2O3) with Chromium traces) — mineral

Ruby (Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Graphite-veined Quartzite (Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)) — metamorphic

Graphite-veined Quartzite

Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)

Epidote with Unakite characteristics ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)) — metamorphic

Epidote with Unakite characteristics

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Sodalite (Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Na8(Al6Si6O24)Cl2

Ferruginous Sandstone (Ferruginous Clastic Sedimentary Rock) — sedimentary

Ferruginous Sandstone

Ferruginous Clastic Sedimentary Rock

Quartzite (River Cobble) (Quartzite (SiO2)) — metamorphic

Quartzite (River Cobble)

Quartzite (SiO2)

Cubic Zirconia (Zirconium Dioxide (ZrO2)) — mineral

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Bauxite (Bauxite (mixture of Gibbiste Al(OH)3, Boehmite ̳-AlO(OH), and Diaspore ́-AlO(OH))) — sedimentary

Bauxite

Bauxite (mixture of Gibbiste Al(OH)3, Boehmite ̳-AlO(OH), and Diaspore ́-AlO(OH))

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

Chert (Jasper) Pebble

Microcrystalline Quartz (SiO2)

Coal (Anthracite / Bituminous) (Organic Sedimentary Rock (Carbon-based)) — sedimentary

Coal (Anthracite / Bituminous)

Organic Sedimentary Rock (Carbon-based)

Chert (and Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (and Flint)

Silicon Dioxide (SiO2)

Diamond (Green tinted) (Carbon (C) with trace impurities or lattice defects) — mineral

Diamond (Green tinted)

Carbon (C) with trace impurities or lattice defects

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

Diamond (Cut Specimen)

Diamond (pure carbon, C)

Fossilized oyster shell (Bivalvia; likely an oyster (Ostreidae), partly mineralized with calcite) — fossil

Fossilized oyster shell

Bivalvia; likely an oyster (Ostreidae), partly mineralized with calcite

Diamond (or Cut Gemstone / Cubic Zirconia) (Carbon (C)) — gemstone

Diamond (or Cut Gemstone / Cubic Zirconia)

Carbon (C)

Weathered fossiliferous limestone fragment, possibly fossil coral or shell material (Indeterminate carbonate fossil in calcitic limestone; likely composed mainly of calcite (CaCO₃), but species identification is not possible from this image alone) — fossil

Weathered fossiliferous limestone fragment, possibly fossil coral or shell material

Indeterminate carbonate fossil in calcitic limestone; likely composed mainly of calcite (CaCO₃), but species identification is not possible from this image alone

Diamond ring (Diamond (crystalline carbon, C)) — gemstone

Diamond ring

Diamond (crystalline carbon, C)

Tumbled red jasper with a quartz vein (Jasper (microcrystalline quartz, SiO₂), likely crossed by milky quartz) — metamorphic

Tumbled red jasper with a quartz vein

Jasper (microcrystalline quartz, SiO₂), likely crossed by milky quartz

Chalcedony (Botryoidal or Tumbled) (Chalcedony (SiO₂)) — mineral

Chalcedony (Botryoidal or Tumbled)

Chalcedony (SiO₂)

The user-provided image does not contain a rock or mineral specimen — N/A

The user-provided image does not contain a rock or mineral specimen

Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — mineralological variety

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

mineralological variety

Yellow Ochre / Limonite (Limonite (FeO(OH)·nH2O)) — Mineral

Yellow Ochre / Limonite

Limonite (FeO(OH)·nH2O)

Agate (Chalcedony (Cryptocrystalline variety of Quartz, SiO2)) — mineral

Agate

Chalcedony (Cryptocrystalline variety of Quartz, SiO2)

Fossil shark tooth (Likely Otodus megalodon (species identification uncertain from image)) — fossil

Fossil shark tooth

Likely Otodus megalodon (species identification uncertain from image)

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

Diamond

Diamond (pure Carbon, C)

Unakite (likely) (Epidote–pink feldspar–quartz rock; commonly termed unakite) — metamorphic

Unakite (likely)

Epidote–pink feldspar–quartz rock; commonly termed unakite

Chert (Jasper/Common Opal transition) (Microcrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary

Chert (Jasper/Common Opal transition)

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Tumbled labradorite (Labradorite, calcium-rich plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈) — mineral

Tumbled labradorite

Labradorite, calcium-rich plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈

Diamond (Rough) (Carbon (C)) — gemstone

Diamond (Rough)

Carbon (C)

Yellow Calcite (Polished) (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite (Polished)

Calcium Carbonate (CaCO3)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Mica Schist (Schist (muscovite-biotite schist)) — metamorphic

Mica Schist

Schist (muscovite-biotite schist)