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

Raw gold nugget or gold-bearing quartz (Native gold (Au), possibly with quartz (SiO₂) and iron-oxide staining) — mineral

Raw gold nugget or gold-bearing quartz

Native gold (Au), possibly with quartz (SiO₂) and iron-oxide staining

Sandstone Pebble (River Rock) (Sandstone (Quartz-rich sedimentary rock with iron oxide staining)) — sedimentary

Sandstone Pebble (River Rock)

Sandstone (Quartz-rich sedimentary rock with iron oxide staining)

Sandstone (Sandstone (composed mainly of Quartz, SiO2, and Feldspar)) — sedimentary

Sandstone

Sandstone (composed mainly of Quartz, SiO2, and Feldspar)

Riverstone Quartzite (Quartzite (primarily SiO2)) — metamorphic

Riverstone Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

Agate (Silicon Dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon Dioxide (Chalcedony), SiO2

Sandstone (Iron-stained) (Arenite (composed primarily of SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Iron-stained)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

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

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Lava Rock (Basalt) (Basalt (extrusive igneous rock)) — igneous

Lava Rock (Basalt)

Basalt (extrusive igneous rock)

Sandstone (Quartzose) (Arenite (composed mainly of SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (composed mainly of SiO2)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Travertine (Travertine (a terrestrial form of Limestone, CaCO3)) — sedimentary

Travertine

Travertine (a terrestrial form of Limestone, CaCO3)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Red Sandstone (Ferruginous Sandstone (formula varies, primarily SiO2 with Fe2O3)) — sedimentary

Red Sandstone

Ferruginous Sandstone (formula varies, primarily SiO2 with Fe2O3)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Sandstone (Ferruginous) (Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Chert Nodule (Commonly known as Flint or River Rock) (Silicon Dioxide (SiO2)) — sedimentary

Chert Nodule (Commonly known as Flint or River Rock)

Silicon Dioxide (SiO2)

Travertine (Calcareous Tufa / Travertine (CaCO3)) — sedimentary

Travertine

Calcareous Tufa / Travertine (CaCO3)

Quartz (Small Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Basalt (Basalt) — igneous

Basalt

Basalt

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Caliche (with Lichen Cover) (Calcium carbonate-cemented soil layer (CaCO3)) — sedimentary

Caliche (with Lichen Cover)

Calcium carbonate-cemented soil layer (CaCO3)

Red Jasper with Quartz Vein (Microcrystalline Quartz (SiO2) with Hematite inclusions) — sedimentary

Red Jasper with Quartz Vein

Microcrystalline Quartz (SiO2) with Hematite inclusions

Red Sandstone (Arenic rock (composed mainly of SiO2 with Fe2O3)) — sedimentary

Red Sandstone

Arenic rock (composed mainly of SiO2 with Fe2O3)

Chert (Field Stone) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Field Stone)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Serpentine (Antigorite, Lizardite, or Chrysotile; Mg3Si2O5(OH)4) — metamorphic

Serpentine

Antigorite, Lizardite, or Chrysotile; Mg3Si2O5(OH)4

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Quartzite Pebble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Petrified Wood (Silicified Wood (primarily Quartz/Chalcedony, formula: SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, formula: SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Sandstone (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Arenite)

Sandstone (Quartz Arenite) (Sandstone (Chemical formula: primarily SiO2)) — sedimentary

Sandstone (Quartz Arenite)

Sandstone (Chemical formula: primarily SiO2)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Yellow-green jasper or serpentine-rich rock (Likely microcrystalline quartz (SiO₂) with iron-bearing and/or serpentine minerals; exact identification requires testing) — mineral

Yellow-green jasper or serpentine-rich rock

Likely microcrystalline quartz (SiO₂) with iron-bearing and/or serpentine minerals; exact identification requires testing

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

Sandstone

Clastic sedimentary rock (Quartz arenite)

Quartzite Cobble (Quartzite (SiO2)) — metamorphic

Quartzite Cobble

Quartzite (SiO2)