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

Diamond in Kimberlite (Diamond (C in Kimberlite Matrix)) — igneous

Diamond in Kimberlite

Diamond (C in Kimberlite Matrix)

Pearl (Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)) — mineral

Pearl

Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)

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

Rough Diamond

Diamond (pure Carbon, C)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Diamond

Diamond (Pure Carbon, C)

Coquina (Bioclastic Limestone (composed primarily of CaCO3)) — sedimentary

Coquina

Bioclastic Limestone (composed primarily of CaCO3)

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Quartzite (Quartzite (Metamorphic Quartz Sandstone)) — metamorphic

Quartzite

Quartzite (Metamorphic Quartz Sandstone)

Rough Diamond (Pure Carbon (C)) — mineral

Rough Diamond

Pure Carbon (C)

Fossilized Shark Tooth (Fragment) (Elasmobranchii gen. et sp. indet. (Calcium Phosphate / Apatite fossil)) — fossil

Fossilized Shark Tooth (Fragment)

Elasmobranchii gen. et sp. indet. (Calcium Phosphate / Apatite fossil)

Chert (and Jasper/Chalcedony mixture) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (and Jasper/Chalcedony mixture)

Microcrystalline Quartz (SiO2)

Bituminous Coal (with Anthracite or Vitrinite inclusion) (Organic-rich Sedimentary Rock (Carboniferous classification)) — sedimentary

Bituminous Coal (with Anthracite or Vitrinite inclusion)

Organic-rich Sedimentary Rock (Carboniferous classification)

Tumbled chalcedony (likely blue-gray agate) (Cryptocrystalline quartz, SiO₂; chalcedony/agate variety) — mineral

Tumbled chalcedony (likely blue-gray agate)

Cryptocrystalline quartz, SiO₂; chalcedony/agate variety

Limestone (Calcareous sedimentary rock (CaCO3)) — sedimentary

Limestone

Calcareous sedimentary rock (CaCO3)

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

Rough Diamond

Diamond (pure Carbon, C)

Quartzite (Metamorphosed Quartz Sandstone) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone

Sandstone (Sandstone (Quartz-rich Arenite / SiO2)) — sedimentary

Sandstone

Sandstone (Quartz-rich Arenite / SiO2)

Emerald (Rough) (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — mineral

Emerald (Rough)

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Dark rounded pebble, likely basalt or slag (Probable fine-grained mafic rock; possibly basalt (plagioclase–pyroxene) or industrial iron/steel slag) — igneous

Dark rounded pebble, likely basalt or slag

Probable fine-grained mafic rock; possibly basalt (plagioclase–pyroxene) or industrial iron/steel slag

Tree Agate (Chalcedony (SiO2)) — gemstone

Tree Agate

Chalcedony (SiO2)

Diamond (in jewelry setting) (Carbon (C)) — mineral

Diamond (in jewelry setting)

Carbon (C)

Pearl (Aragonite (CaCO3) with Conchiolin) — mineral

Pearl

Aragonite (CaCO3) with Conchiolin

Pink Marble (Recrystallized Limestone (Calcium Carbonate, CaCO3)) — metamorphic

Pink Marble

Recrystallized Limestone (Calcium Carbonate, CaCO3)

Sandstone (likely Quartzose Sandstone) (Arenite) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite

Quartzite (Silica (SiO2) quartzite) — metamorphic

Quartzite

Silica (SiO2) quartzite

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Chalk (Micrite (primarily Calcium Carbonate, CaCO3)) — sedimentary

Chalk

Micrite (primarily Calcium Carbonate, CaCO3)

Likely blue glass or synthetic gemstone jewelry (Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass) — gemstone

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

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

Sandstone (with iron staining)

Quartz Arenite / Ferruginous Sandstone

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

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Granite (Pegmatitic) (Phaneritic Felsic Igneous Rock) — igneous

Granite (Pegmatitic)

Phaneritic Felsic Igneous Rock

Chert (specifically White Chert or Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically White Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Dumortierite in Quartz (Dumortierite (Al6O3(BO3)(SiO4)3) with Quartz (SiO2)) — mineral

Dumortierite in Quartz

Dumortierite (Al6O3(BO3)(SiO4)3) with Quartz (SiO2)

Flint (Silicon dioxide (SiO2)) — sedimentary

Flint

Silicon dioxide (SiO2)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)