Rock Identifier

Category

Anthropogenic (Man Made Artifact)

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

Banded Agate (specifically Chalcedony nodule) (Agate (Silicon Dioxide, SiO2)) — mineral

Banded Agate (specifically Chalcedony nodule)

Agate (Silicon Dioxide, SiO2)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Banded Gneiss (Gneiss (typically quartz, feldspar, mica, amphibole composition)) — metamorphic

Banded Gneiss

Gneiss (typically quartz, feldspar, mica, amphibole composition)

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

Quartz

Quartz (SiO2 - Silicon Dioxide)

Chert (Flint) (Chert (predominantly SiO₂ - silicon dioxide)) — sedimentary

Chert (Flint)

Chert (predominantly SiO₂ - silicon dioxide)

Amber (Succinite (fossilized tree resin)) — mineraloid

Amber

Succinite (fossilized tree resin)

Bornite (Bornite (Cu5FeS4)) — mineral

Bornite

Bornite (Cu5FeS4)

Optical Calcite (Iceland Spar) (Calcite (Calcium Carbonate, CaCO3)) — mineral

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Orange Quartzite (River Pebble) (Quartzite (SiO2 with iron oxide impurities)) — metamorphic

Orange Quartzite (River Pebble)

Quartzite (SiO2 with iron oxide impurities)

Blue Lace Agate (Heat-treated/Crackle Quartz variety) (Silicon Dioxide (SiO2)) — mineral

Blue Lace Agate (Heat-treated/Crackle Quartz variety)

Silicon Dioxide (SiO2)

Iron Meteorite (likely Chondrite or Iron-Nickel fragment) (Siderite (Iron Meteorite), primarily Fe-Ni (Iron-Nickel) alloy) — igneous

Iron Meteorite (likely Chondrite or Iron-Nickel fragment)

Siderite (Iron Meteorite), primarily Fe-Ni (Iron-Nickel) alloy

Marble (Metamorphosed Limestone (main mineral: Calcite, CaCO3)) — metamorphic

Marble

Metamorphosed Limestone (main mineral: Calcite, CaCO3)

Kambaba Jasper (Stromatolite (Microbial mat fossil in silicified sediment)) — sedimentary

Kambaba Jasper

Stromatolite (Microbial mat fossil in silicified sediment)

Stromatolite (Biogenic Sedimentary Rock (Lithified microbial mat)) — sedimentary

Stromatolite

Biogenic Sedimentary Rock (Lithified microbial mat)

Sandstone (likely Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (likely Quartzose)

Arenite (primarily SiO2)

Sandstone (Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)) — Sedimentary

Sandstone

Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)

Indian Agate (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Indian Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Yellow Quartzite (River Stone) (Quartzite (composed primarily of Quartz: SiO2)) — metamorphic

Yellow Quartzite (River Stone)

Quartzite (composed primarily of Quartz: SiO2)

Geode with Quartz and Chalcedony (Silicon Dioxide (SiO2)) — sedimentary

Geode with Quartz and Chalcedony

Silicon Dioxide (SiO2)

Biotite / Black Mica (Biotite K(Mg,Fe)3AlSi3O10(F,OH)2) — mineral

Biotite / Black Mica

Biotite K(Mg,Fe)3AlSi3O10(F,OH)2

Prase Quartz on Feldspar (Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)) — mineral

Prase Quartz on Feldspar

Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)

Shale with Iron Oxide Staining (Fissile Mudstone (primarily clay minerals and quartz)) — sedimentary

Shale with Iron Oxide Staining

Fissile Mudstone (primarily clay minerals and quartz)

Quartz with Mica (Micaceous Quartz) (Silicon Dioxide (SiO2) with Phyllosilicates) — igneous/metamorphic

Quartz with Mica (Micaceous Quartz)

Silicon Dioxide (SiO2) with Phyllosilicates

igneous/metamorphic

Hematite (Ferric oxide (Fe2O3)) — mineral

Hematite

Ferric oxide (Fe2O3)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Basalt (Vesicular Basalt (Mafic volcanic rock)) — Igneous

Basalt

Vesicular Basalt (Mafic volcanic rock)

Quartz (likely Jasper or Chert variety) (Quartz (SiO₂)) — Mineral

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Green Aventurine (Aventurine (a variety of Quartz, SiO2)) — Mineral

Green Aventurine

Aventurine (a variety of Quartz, SiO2)

Sandstone (Ferruginous) (Arenite (Fe-rich)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-rich)

Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Calcite

Calcite (Calcium Carbonate, CaCO3)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)

Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

Obsidian (Obsidian (Extrusive Volcanic Glass)) — igneous

Obsidian

Obsidian (Extrusive Volcanic Glass)

Sandstone (Arenite (a specific type of sandstone with less than 15% matrix)) — Sedimentary rock

Sandstone

Arenite (a specific type of sandstone with less than 15% matrix)

Sedimentary rock

Sandstone (Arenite (primarily composed of SiO2)) — sedimentary

Sandstone

Arenite (primarily composed of SiO2)

Nephrite Jade (Ca2(Mg, Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

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

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

Granite Pebble (Salt and Pepper Granite) (Felsic Intrusive Igneous Rock (Granite)) — igneous

Granite Pebble (Salt and Pepper Granite)

Felsic Intrusive Igneous Rock (Granite)

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Arid Sandy Loam (Arenosols / Regosols) — sedimentary

Arid Sandy Loam

Arenosols / Regosols

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Sandstone (Ferruginous) (Arenite with Iron Oxide (Fe2O3) cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide (Fe2O3) cement