Rock Identifier

Category

Not A Rock (Man Made Origin)

Browse not a rock (man made origin) specimens identified by the Rock Identifier community.

Chert (specifically Jasper) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Chert (specifically Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions

Agatized Petrified Wood (Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood) — metamorphic

Agatized Petrified Wood

Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood

Green Banded Agate (Agate (Variety of Chalcedony/Quartz), SiO2) — mineral

Green Banded Agate

Agate (Variety of Chalcedony/Quartz), SiO2

Marble (Recrystallized Calcite (CaCO3) Rock) — metamorphic

Marble

Recrystallized Calcite (CaCO3) Rock

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Chert / Flint Conglomerate (Silicified Sedimentary Breccia (primarily SiO2)) — sedimentary

Chert / Flint Conglomerate

Silicified Sedimentary Breccia (primarily SiO2)

Petrified Wood (Silicified Wood (primarily SiO2 - Silicon Dioxide)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Gneiss (High-grade Metamorphic Rock) (Gneiss (Metamorphic silicate rock)) — metamorphic

Gneiss (High-grade Metamorphic Rock)

Gneiss (Metamorphic silicate rock)

Pumice (likely) (Pumice (extrusive igneous rock)) — Igneous

Pumice (likely)

Pumice (extrusive igneous rock)

Ocean Jasper (Spherulitic Chalcedony (SiO2)) — mineral

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Porphyritic Andesite (Porphyritic intermediate volcanic rock (Andesite)) — Igneous

Porphyritic Andesite

Porphyritic intermediate volcanic rock (Andesite)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

River Stone (Chert/Siltstone) (Cryptocrystalline Quartz (SiO2) with trace impurities) — sedimentary

River Stone (Chert/Siltstone)

Cryptocrystalline Quartz (SiO2) with trace impurities

Arkosic Sandstone (or Conglomeritic Sandstone fragment) (Arkose (rich in feldspar)) — sedimentary

Arkosic Sandstone (or Conglomeritic Sandstone fragment)

Arkose (rich in feldspar)

Diorite (Phaneritic Intrusive Igneous Rock (Intermediate Composition)) — igneous

Diorite

Phaneritic Intrusive Igneous Rock (Intermediate Composition)

Basalt (Basalt (extrusive igneous rock)) — Igneous

Basalt

Basalt (extrusive igneous rock)

Ferruginous Sandstone (Ferruginous Clastic Sedimentary Rock) — sedimentary

Ferruginous Sandstone

Ferruginous Clastic Sedimentary Rock

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Granite (Phaneritic Acidic Igneous Rock (Granite Group)) — igneous

Granite

Phaneritic Acidic Igneous Rock (Granite Group)

Carnelian (Carnelian (SiO2)) — mineral

Carnelian

Carnelian (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)) — sedimentary

Sandstone

Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)

Granite / Gneiss Complex (Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)) — igneous/metamorphic

Granite / Gneiss Complex

Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)

igneous/metamorphic

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

Sandstone (likely Fossiliferous)

Arenite / Sedimentum arenaceum

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Sandstone (Clastic Sedimentary Rock (composed mostly of SiO2)) — sedimentary

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)

Quartz (Milky or Cloudy Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Turquoise (Turquoise (Hydrated phosphate of copper and aluminium) CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium) CuAl6(PO4)4(OH)8·4H2O

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Gneiss (Metamorphic Rock) (Gneiss) — metamorphic

Gneiss (Metamorphic Rock)

Gneiss

Granite (Thin Section) (Granite (Felsic Plutonic Rock)) — igneous

Granite (Thin Section)

Granite (Felsic Plutonic Rock)

Sandstone (Ferruginous) (Arenite (composed primarily of SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Fossiliferous Limestone (Fossiliferous Calclutite / Bio-calcarenite (CaCO3)) — sedimentary

Fossiliferous Limestone

Fossiliferous Calclutite / Bio-calcarenite (CaCO3)

Quartz Vein in Host Rock (Silicon Dioxide (SiO2) within a metamorphic matrix) — metamorphic

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within a metamorphic matrix

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

Sandstone

Arenite (composed primarily of SiO2)

Banded Sandstone (Wonderstone) (Sandstone with Liesegang Rings (SiO2 with Iron Oxides)) — sedimentary

Banded Sandstone (Wonderstone)

Sandstone with Liesegang Rings (SiO2 with Iron Oxides)

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

Chert / Jasper

Microcrystalline Quartz (SiO2)

Schorl (Black Tourmaline) in Quartz or Feldspar Matrix (NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl) in Granitic Pegmatite) — igneous

Schorl (Black Tourmaline) in Quartz or Feldspar Matrix

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl) in Granitic Pegmatite