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

Rock Gypsum

Coral Rock

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Zincite

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Opalite

Sandstone (Arenite) — Sedimentary

Sandstone

Arenite

Porphyry (Rhyolite or Andesite Porphyry) (Porphyritic Igneous Rock) — igneous

Porphyry (Rhyolite or Andesite Porphyry)

Porphyritic Igneous Rock

Sandstone (Sandstone (SiO2 dominated)) — sedimentary

Sandstone

Sandstone (SiO2 dominated)

Sandstone (Arenite (primarily Quartz and Feldspar composition)) — sedimentary

Sandstone

Arenite (primarily Quartz and Feldspar composition)

Sandstone (Arenite (SiO2 based with mineral cements)) — sedimentary

Sandstone

Arenite (SiO2 based with mineral cements)

Sandstone (with Calcite or Silica veins) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with Calcite or Silica veins)

Clastic sedimentary rock (primarily SiO2)

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

Sandstone

Arenite (primarily Quartz-based)

Sandstone (Arenite (specifically Quartz Arenite)) — sedimentary

Sandstone

Arenite (specifically Quartz Arenite)

Vesicular basalt (likely weathered scoria) (Basaltic volcanic rock; primarily plagioclase, pyroxene, and olivine, with iron oxides) — igneous

Vesicular basalt (likely weathered scoria)

Basaltic volcanic rock; primarily plagioclase, pyroxene, and olivine, with iron oxides

Sandstone (Arenite (Sandstone)) — sedimentary

Sandstone

Arenite (Sandstone)

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

Sandstone

Arenite (composed primarily of SiO2)

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

Sandstone

Arenite (composed primarily of SiO2)

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

Sandstone (Picture Sandstone)

Arenite (primarily SiO2)

River Pebble (Greywacke / Basalt Pebble) (Indeterminate Rounded Pebble (composed of quartz, feldspar, or mafic minerals)) — sedimentary

River Pebble (Greywacke / Basalt Pebble)

Indeterminate Rounded Pebble (composed of quartz, feldspar, or mafic minerals)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone Pebble (Quartz Arenite / Sandstone) — sedimentary

Sandstone Pebble

Quartz Arenite / Sandstone

Sandstone (Arenite (specifically Quartz Arenite)) — sedimentary

Sandstone

Arenite (specifically Quartz Arenite)

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

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains)

Sandstone (Arenite (often composed of Quartz, SiO2)) — sedimentary

Sandstone

Arenite (often composed of Quartz, SiO2)

Sandstone (with concrete/human-made layer) (Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)) — sedimentary

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

Quartzite Pebbler (Quartzite (SiO2)) — metamorphic

Quartzite Pebbler

Quartzite (SiO2)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Gravel / Small Pebble (Rock Fragment (Gravel)) — sedimentary

Gravel / Small Pebble

Rock Fragment (Gravel)

Granite-like cobble (Granitoid, likely biotite granite or granodiorite) — igneous

Granite-like cobble

Granitoid, likely biotite granite or granodiorite

Petrified Wood (Fossilized wood, permineralized wood (typically composed of SiO2)) — fossil

Petrified Wood

Fossilized wood, permineralized wood (typically composed of SiO2)

Unidentified brown rock fragment (Indeterminate from image; likely a weathered iron-rich lithic fragment) — igneous, sedimentary, metamorphic, mineral, gemstone, fossil, or meteorite

Unidentified brown rock fragment

Indeterminate from image; likely a weathered iron-rich lithic fragment

igneous, sedimentary, metamorphic, mineral, gemstone, fossil, or meteorite

Micaceous schist (likely biotite schist) (Biotite–quartz–feldspar schist; commonly containing muscovite and/or garnet) — metamorphic

Micaceous schist (likely biotite schist)

Biotite–quartz–feldspar schist; commonly containing muscovite and/or garnet

River Rock (Mixed lithology clast) — sedimentary

River Rock

Mixed lithology clast

Chert Nodules or Concretion (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Nodules or Concretion

Cryptocrystalline Quartz (SiO2)

Coarse-grained Granite or Gneiss (Granitic intrusive rock) — igneous

Coarse-grained Granite or Gneiss

Granitic intrusive rock

Pale blue-gray quartz-rich pebble (tentative) (Quartz, SiO₂, possibly chalcedony or a weathered metamorphic fragment) — mineral

Pale blue-gray quartz-rich pebble (tentative)

Quartz, SiO₂, possibly chalcedony or a weathered metamorphic fragment

Quartz Pebble (with Hematite/Feldspar Inclusions) (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble (with Hematite/Feldspar Inclusions)

Silicon Dioxide (SiO2)

Sandstone (Sandstone (SiO2-dominated clastic rock)) — sedimentary

Sandstone

Sandstone (SiO2-dominated clastic rock)

Jasper (Silicon dioxide (Microcrystalline quartz, SiO2)) — mineral

Jasper

Silicon dioxide (Microcrystalline quartz, SiO2)

Mudstone (Argillite) — sedimentary

Mudstone

Argillite

Granite Cobble (Granite (Phaneritic igneous rock)) — igneous

Granite Cobble

Granite (Phaneritic igneous rock)

Pink Granite / Gneiss Pebble (Quartz-Feldspar Granitic Rock) — igneous

Pink Granite / Gneiss Pebble

Quartz-Feldspar Granitic Rock

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

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Unidentified brown mineral/rock fragment (Indeterminate from image; possibly iron-stained quartz, feldspar, or weathered limonite) — mineral

Unidentified brown mineral/rock fragment

Indeterminate from image; possibly iron-stained quartz, feldspar, or weathered limonite

Asphalt aggregate pavement (Bituminous asphalt concrete containing crushed stone aggregate) — sedimentary

Asphalt aggregate pavement

Bituminous asphalt concrete containing crushed stone aggregate

Weathered iron-rich rock, possibly limonite/goethite-bearing breccia (Hydrated iron oxides/hydroxides, mainly limonite (mixture) and goethite, FeO(OH)·nH₂O) — mineral

Weathered iron-rich rock, possibly limonite/goethite-bearing breccia

Hydrated iron oxides/hydroxides, mainly limonite (mixture) and goethite, FeO(OH)·nH₂O