Rock Identifier

Category

Anthropogenic Specimen (Man Made)

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

Fossiliferous Limestone (Crinoidal Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Crinoidal Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Agate (Polished Slice) (Banded Chalcedony (SiO2)) — mineral

Agate (Polished Slice)

Banded Chalcedony (SiO2)

Yellow Quartzite (River Pebble) (Quartzite (mainly SiO2)) — metamorphic

Yellow Quartzite (River Pebble)

Quartzite (mainly SiO2)

Agate (Common Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Agate (Common Chalcedony)

Silicon Dioxide (SiO2)

Quartz (with iron oxide staining) (Silicon Dioxide (SiO2)) — mineral

Quartz (with iron oxide staining)

Silicon Dioxide (SiO2)

Orca Agate (Chalcedony) (Silicon Dioxide (SiO2) with inclusions) — mineral

Orca Agate (Chalcedony)

Silicon Dioxide (SiO2) with inclusions

Chert / Greenstone (Silicon Dioxide (SiO2) with impurities) — sedimentary

Chert / Greenstone

Silicon Dioxide (SiO2) with impurities

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

White Salt Crystal Lamp (Halite) (Halite (Sodium Chloride, NaCl)) — mineral

White Salt Crystal Lamp (Halite)

Halite (Sodium Chloride, NaCl)

Quartzite Beach Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Beach Pebble

Quartzite (primarily SiO2)

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

Yellow Quartzite (River Stone)

Quartzite (composed primarily of Quartz: SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Sandstone (River Cobble) (Clastic sedimentary rock (primarily SiO2 with various lithic fragments)) — sedimentary

Sandstone (River Cobble)

Clastic sedimentary rock (primarily SiO2 with various lithic fragments)

Quartz (Rose or Milky variety fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Rose or Milky variety fragment)

Silicon Dioxide (SiO2)

Chert (variations include Flint or Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (variations include Flint or Jasper)

Silicon Dioxide (SiO2)

Fluorite (Purple variety) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Purple variety)

Calcium Fluoride (CaF2)

Quartz (Clear/White) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear/White)

Silicon Dioxide (SiO2)

Jasper (Iron-stained Chert) (Silicon Dioxide (SiO2)) — sedimentary

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2)

Basalt (Gravel Pebble) (Basalt (contains pyroxene, plagioclase feldspar, and olivine)) — igneous

Basalt (Gravel Pebble)

Basalt (contains pyroxene, plagioclase feldspar, and olivine)

Granite Cobble (Felsic intrusive igneous rock) — igneous

Granite Cobble

Felsic intrusive igneous rock

Azurite with Malachite (Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2) — mineral

Azurite with Malachite

Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2

Red Jasper (River Polished Quartzite) (Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) impurities) — sedimentary

Red Jasper (River Polished Quartzite)

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) impurities

Pink Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Pink Opal

Hydrated Silica (SiO2·nH2O)

Amethyst (Silicon Dioxide (SiO2) with trace Iron (Fe3+)) — mineral

Amethyst

Silicon Dioxide (SiO2) with trace Iron (Fe3+)

Milky Quartz (Quartz (Silicon Dioxide - SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz (Smoky or Clear variety with inclusions) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky or Clear variety with inclusions)

Silicon Dioxide (SiO2)

Shale (with minor calcite veining) (Clastic sedimentary rock (primarily clay minerals and quartz)) — sedimentary

Shale (with minor calcite veining)

Clastic sedimentary rock (primarily clay minerals and quartz)

Agate Nodule (partially vuggy Quartz) (Silicon Dioxide (SiO2)) — Mineral/Sedimentary

Agate Nodule (partially vuggy Quartz)

Silicon Dioxide (SiO2)

Mineral/Sedimentary

Quartz (River Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Sandstone (with potential Quartzite characteristics) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with potential Quartzite characteristics)

Clastic sedimentary rock (primarily SiO2)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Ferruginous Quartz (Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions) — mineral

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions

Feldspathic Granite (likely Syenite or Granite Pegmatite) (Phaneritic Acidic Igneous Rock (KAlSi3O8 dominant with SiO2)) — igneous

Feldspathic Granite (likely Syenite or Granite Pegmatite)

Phaneritic Acidic Igneous Rock (KAlSi3O8 dominant with SiO2)

Basalt with Quartz/Feldspar Inclusions (Amygdaloidal or Porphyritic Mafic Volcanic Rock with Siliceous Veining) — igneous

Basalt with Quartz/Feldspar Inclusions

Amygdaloidal or Porphyritic Mafic Volcanic Rock with Siliceous Veining

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

Geode with Quartz and Chalcedony

Silicon Dioxide (SiO2)

Basalt River Stone (Basalt) — igneous

Basalt River Stone

Basalt

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Ferruginous Sandstone (Ironstone) (Sedimentary rock with high iron oxide content (Fe2O3 / FeO(OH))) — sedimentary

Ferruginous Sandstone (Ironstone)

Sedimentary rock with high iron oxide content (Fe2O3 / FeO(OH))

Anyolite (Ruby in Zoisite) (Zoisite with inclusions of Hornblende and Ruby (Ca2Al3(SiO4)3(OH))) — metamorphic

Anyolite (Ruby in Zoisite)

Zoisite with inclusions of Hornblende and Ruby (Ca2Al3(SiO4)3(OH))

Fluorite (Durango Fluorite) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Durango Fluorite)

Calcium Fluoride (CaF2)

Chalcedony (Botryoidal Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Botryoidal Agate)

Silicon Dioxide (SiO2)