Rock Identifier

Category

Not A Rock (Synthetic Material)

Browse not a rock (synthetic material) specimens identified by the Rock Identifier community.

Learn about Not A Rock (Synthetic Material) in the encyclopedia

Dunite

Metarhyolite

Limonite

Rock Salt

Coral Rock

Rock Gypsum

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zincite

Opalite

Clay (as a rock-forming material) (Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)) — Mineral

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Geode or Concretion (Silica-filled nodule (likely SiO2)) — sedimentary

Geode or Concretion

Silica-filled nodule (likely SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Banded Sandstone (Arenite (Sandstone with iron oxide banding)) — sedimentary

Banded Sandstone

Arenite (Sandstone with iron oxide banding)

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

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Conglomerate (Conglomerate) — sedimentary

Conglomerate

Conglomerate

Sandstone (Arenite (primarily Quartz-based Sandstone)) — sedimentary

Sandstone

Arenite (primarily Quartz-based Sandstone)

Petrified Wood (Silicified wood (Quartz/Chalcedony replacement of organic matter)) — fossil

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of organic matter)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 based)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Sandstone Pebble (Sedimentary quartz arenite) — sedimentary

Sandstone Pebble

Sedimentary quartz arenite

Limestone or Sandstone Cobble (Sedimentary rock (Calcium carbonate or Quartz based)) — sedimentary

Limestone or Sandstone Cobble

Sedimentary rock (Calcium carbonate or Quartz based)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Weathered quartz-rich sandstone or granitic rock (Indeterminate; likely iron-stained quartz sandstone, possibly weathered granite) — sedimentary

Weathered quartz-rich sandstone or granitic rock

Indeterminate; likely iron-stained quartz sandstone, possibly weathered granite

Banded gneiss pebble (Gneiss, typically quartz–feldspar–mica assemblage) — metamorphic

Banded gneiss pebble

Gneiss, typically quartz–feldspar–mica assemblage

Banded gneiss (Gneiss, chiefly quartz–feldspar–mica (variable composition)) — metamorphic

Banded gneiss

Gneiss, chiefly quartz–feldspar–mica (variable composition)

Sandstone (Quartz Arenite) — sedimentary

Sandstone

Quartz Arenite

Sandstone (River Rock) (Arenite (SiO2 based sedimentary rock)) — sedimentary

Sandstone (River Rock)

Arenite (SiO2 based sedimentary rock)

Quartz Pebble (Crystalline Silica (SiO2)) — sedimentary

Quartz Pebble

Crystalline Silica (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite cobble (Quartzite (SiO2)) — metamorphic

Quartzite cobble

Quartzite (SiO2)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Quartz-veined Siltstone (Siltstone with Quartz (SiO2) veins) — sedimentary

Quartz-veined Siltstone

Siltstone with Quartz (SiO2) veins

Sandstone (Clastic sedimentary rock (Quartz arenite/Arkose)) — sedimentary

Sandstone

Clastic sedimentary rock (Quartz arenite/Arkose)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Ferruginous) (Arenite with Iron Oxides) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxides

Gneiss (Metamorphic Rock) (Gneiss) — metamorphic

Gneiss (Metamorphic Rock)

Gneiss

Sandstone (Arenite (SiO2 principal component)) — sedimentary

Sandstone

Arenite (SiO2 principal component)

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

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

River Jasper (Chert/Chalcedony mix) (Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions) — sedimentary

River Jasper (Chert/Chalcedony mix)

Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions

Sandstone (Ferruginous) (Arenite (SiO2 with Iron Oxide impurities)) — sedimentary

Sandstone (Ferruginous)

Arenite (SiO2 with Iron Oxide impurities)

Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Sandstone (with carbonaceous plant fragments) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (with carbonaceous plant fragments)

Arenite (composed primarily of SiO2)

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Quartzite with Iron Staining (Silicon Dioxide (SiO2) with Fe2O3 impurities) — metamorphic

Quartzite with Iron Staining

Silicon Dioxide (SiO2) with Fe2O3 impurities

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)

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

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with iron oxide cement)