Rock Identifier

Category

Amorphous Solid

Browse amorphous solid specimens identified by the Rock Identifier community.

Learn about Amorphous Solid in the encyclopedia

Tripolite

Rainbow Obsidian

Rainbow Obsidian

Oil Shale

Apache Tears

Grandite Garnet

Geyserite

Gold Sheen Obsidian

Black Obsidian

Diatomaceous Earth

Shungite

Flame Obsidian

Smoky Obsidian

Coral Skeleton / Fossil Coral (Scleractinia (Aragonite, CaCO3)) — fossil

Coral Skeleton / Fossil Coral

Scleractinia (Aragonite, CaCO3)

Quartz Geode Fragment (Silicon dioxide (SiO2) within a nodule) — sedimentary

Quartz Geode Fragment

Silicon dioxide (SiO2) within a nodule

Chondrite Meteorite (Stony Meteorite (Ordinary Chondrite)) — igneous

Chondrite Meteorite

Stony Meteorite (Ordinary Chondrite)

Quartz Geode (Crystalline Silicon Dioxide (SiO2) in Geode) — mineral

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in Geode

Ferruginous Quartz (Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)) — mineral

Ferruginous Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Wood Paneling (Engineered Wood / Plywood Paneling) — not a rock

Wood Paneling

Engineered Wood / Plywood Paneling

Belemnite Fossil (Belemnitella sp. (rostrum)) — fossil

Belemnite Fossil

Belemnitella sp. (rostrum)

Black Onyx (Silicon Dioxide (SiO2) with parallel banding) — mineral

Black Onyx

Silicon Dioxide (SiO2) with parallel banding

Feldspar-rich Quartzite (Meta-arkose (Quartz-Feldspar Quartzite)) — metamorphic

Feldspar-rich Quartzite

Meta-arkose (Quartz-Feldspar Quartzite)

Chert with Asphaltum (or Tar) (Silica (SiO2) with natural Bitumen/Asphaltum) — sedimentary

Chert with Asphaltum (or Tar)

Silica (SiO2) with natural Bitumen/Asphaltum

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Green Quartzite (Quartzite (SiO2 with inclusions)) — metamorphic

Green Quartzite

Quartzite (SiO2 with inclusions)

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

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Red Jasper (Silicon Dioxide (SiO2)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2)

Conglomerate (Conglomerate (clastic sedimentary rock type)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock type)

Ocean Jasper (Orbicular Jasper) (Spherulitic Chalcedony/Rhyolite (SiO2)) — mineral

Ocean Jasper (Orbicular Jasper)

Spherulitic Chalcedony/Rhyolite (SiO2)

Quartz Geode with Goethite/Hematite (Silicon Dioxide (SiO2) with Iron Oxides) — mineral

Quartz Geode with Goethite/Hematite

Silicon Dioxide (SiO2) with Iron Oxides

Red Jasper (Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)

Quartz Geode Fragment (Silicon Dioxide (SiO2) in a Sedimentary Host) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2) in a Sedimentary Host

Green Aventurine (Silicon dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon dioxide (SiO2) with Fuchsite inclusions

Conglomerate (Conglomerate rock) — sedimentary

Conglomerate

Conglomerate rock

Vesicular Basalt (Amygdaloidal) (Vesicular Basalt (Fe-Mg rich extrusive volcanic rock)) — igneous

Vesicular Basalt (Amygdaloidal)

Vesicular Basalt (Fe-Mg rich extrusive volcanic rock)

Iron-stained Quartzite (Quartzite with Limonite/Hematite staining (SiO2 with FeO(OH)·nH2O)) — metamorphic

Iron-stained Quartzite

Quartzite with Limonite/Hematite staining (SiO2 with FeO(OH)·nH2O)

Quartz Geode (Citrine or Iron-stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Red Quartz (Hematoid Quartz) (Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)) — mineral

Red Quartz (Hematoid Quartz)

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Garnet (Almandine) (Almandine (Fe3Al2(SiO4)3)) — mineral

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Scoria (Vesicular Basalt) (Scoria (Hydrated silicate volcanic rock with iron and magnesium)) — igneous

Scoria (Vesicular Basalt)

Scoria (Hydrated silicate volcanic rock with iron and magnesium)

Garnet Schist (Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)) — metamorphic

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

Chondrite Meteorite (Possibility) (Stony Meteorite (Chondrite)) — igneous

Chondrite Meteorite (Possibility)

Stony Meteorite (Chondrite)

Pearls (Pearl: biomineralized aragonite (CaCO₃) and conchiolin) — gemstone

Pearls

Pearl: biomineralized aragonite (CaCO₃) and conchiolin

Shark Tooth Fossil (Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)) — fossil

Shark Tooth Fossil

Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)

Black Onyx (Silicon dioxide (SiO2) with parallel banded structure) — Mineral (variety of chalcedony)

Black Onyx

Silicon dioxide (SiO2) with parallel banded structure

Mineral (variety of chalcedony)

Black onyx or black agate bead bracelet (Microcrystalline quartz, chiefly chalcedony (SiO₂); commonly sold as black onyx, sometimes dyed black agate) — gemstone

Black onyx or black agate bead bracelet

Microcrystalline quartz, chiefly chalcedony (SiO₂); commonly sold as black onyx, sometimes dyed black agate

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Fancy Jasper (Chalcedony (SiO2)) — sedimentary

Fancy Jasper

Chalcedony (SiO2)