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

Tumbled tan pebble, likely sandstone or chert (Uncertain; probable quartz-rich sandstone (SiO₂-bearing)) — sedimentary

Tumbled tan pebble, likely sandstone or chert

Uncertain; probable quartz-rich sandstone (SiO₂-bearing)

Quartzite (with Iron Staining) (Metamorphosed Sandstone (mainly SiO2 with Fe2O3/FeOOH impurities)) — metamorphic

Quartzite (with Iron Staining)

Metamorphosed Sandstone (mainly SiO2 with Fe2O3/FeOOH impurities)

Quartz Veined Mudstone (Metasedimentary rock with Quartz (SiO2) veins) — metamorphic

Quartz Veined Mudstone

Metasedimentary rock with Quartz (SiO2) veins

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Quartzite (with Iron Staining) (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite (with Iron Staining)

Metamorphic Quartzite (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Chert / Flint (Silicon dioxide (SiO2)) — sedimentary

Chert / Flint

Silicon dioxide (SiO2)

Sandstone (Sedimentary Rock (Quartz arenite/Arkosic sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite/Arkosic sandstone)

Sandstone (Water-worn Cobble) (Arenite (variable composition, primarily SiO2)) — sedimentary

Sandstone (Water-worn Cobble)

Arenite (variable composition, primarily SiO2)

Sandstone (with potential iron-oxide staining) (Arenite (primarily SiO2)) — sedimentary

Sandstone (with potential iron-oxide staining)

Arenite (primarily SiO2)

Chert (Chalcedony/Agate) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

Chert (White Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (White Chert)

Silicon Dioxide (SiO2)

Fossil Shell (Bivalve) (Phylum Mollusca, Class Bivalvia) — fossil

Fossil Shell (Bivalve)

Phylum Mollusca, Class Bivalvia

Fossil Seashell (Invertebrate fossil (Bivalvia)) — fossil

Fossil Seashell

Invertebrate fossil (Bivalvia)

Rounded quartz-rich beach pebble (Likely quartzite or quartz-rich sandstone; predominantly quartz (SiO₂)) — sedimentary

Rounded quartz-rich beach pebble

Likely quartzite or quartz-rich sandstone; predominantly quartz (SiO₂)

Goldstone (aventurine glass) (Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)) — mineral

Goldstone (aventurine glass)

Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)

Tumbled tree agate (dendritic agate) (Cryptocrystalline quartz, SiO₂, with manganese/iron-oxide dendrites) — mineral

Tumbled tree agate (dendritic agate)

Cryptocrystalline quartz, SiO₂, with manganese/iron-oxide dendrites

Quartzite (Quartzite (Metamorphosed Quartz Sandstone)) — metamorphic

Quartzite

Quartzite (Metamorphosed Quartz Sandstone)

Chert (and Agate/Quartz in Geode-like Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (and Agate/Quartz in Geode-like Nodule)

Silicon Dioxide (SiO2)

Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx') (Calcite (Calcium Carbonate, CaCO3)) — Sedimentary

Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')

Calcite (Calcium Carbonate, CaCO3)

Aventurine (Quartz (SiO2) with Fuchsite inclusions) — mineral

Aventurine

Quartz (SiO2) with Fuchsite inclusions

Basalt (Basalt) — igneous

Basalt

Basalt

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

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

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Quartzose Sandstone) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert (Arrowheads) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Arrowheads)

Microcrystalline Quartz (SiO2)

Ferruginous Sandstone (Ironstone) (Arenite with Limonite/Goethite cement) — sedimentary

Ferruginous Sandstone (Ironstone)

Arenite with Limonite/Goethite cement

Unakite (Altered Granite (Unakite)) — metamorphic

Unakite

Altered Granite (Unakite)

Felsic Tuff (Pyroclastic volcanic rock (Tuff)) — igneous

Felsic Tuff

Pyroclastic volcanic rock (Tuff)

Granite (Dioritic variant) (Granite (Phaneritic Igneous Rock)) — igneous

Granite (Dioritic variant)

Granite (Phaneritic Igneous Rock)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 cementation)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 cementation)

Titanium Quartz (Aura Quartz) (Silicon Dioxide (SiO2) treated with Titanium) — mineral

Titanium Quartz (Aura Quartz)

Silicon Dioxide (SiO2) treated with Titanium

Peridotite (Olivine Rock) (Peridotite (composed largely of olivine, (Mg, Fe)2SiO4)) — igneous

Peridotite (Olivine Rock)

Peridotite (composed largely of olivine, (Mg, Fe)2SiO4)

Sandstone (Sedimentary Clastic Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Clastic Rock (Quartz Arenite)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Red Sandstone (Arenite (primarily SiO2 with Fe2O3)) — sedimentary

Red Sandstone

Arenite (primarily SiO2 with Fe2O3)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

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

Quartz (Milky or Druzy Quartz)

Silicon Dioxide (SiO2)

Quartz with Sericite and Cinnabar (Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)) — mineral

Quartz with Sericite and Cinnabar

Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)

Slate (Slate (Metamorphic rock)) — metamorphic

Slate

Slate (Metamorphic rock)

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

Sandstone (Ferruginous)

Arenite (with Iron Oxide cement)