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

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — Mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Tektite (Natural impact glass) — meteorite

Tektite

Natural impact glass

Chert (Yellow or Ochre Jasper variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow or Ochre Jasper variant)

Microcrystalline Quartz (SiO2)

Chert (River Pebble) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Basalt with Quartz/Feldspar Vein (Amygdaloidal Basalt with Plutonic intrusion (SiO2/KAlSi3O8)) — igneous

Basalt with Quartz/Feldspar Vein

Amygdaloidal Basalt with Plutonic intrusion (SiO2/KAlSi3O8)

Honey-colored chalcedony (possibly yellow/orange agate or carnelian) (Chalcedony, a microcrystalline variety of quartz; SiO₂. The color may result from iron-oxide inclusions. Exact identification is uncertain from a photograph alone.) — gemstone

Honey-colored chalcedony (possibly yellow/orange agate or carnelian)

Chalcedony, a microcrystalline variety of quartz; SiO₂. The color may result from iron-oxide inclusions. Exact identification is uncertain from a photograph alone.

Druzy quartz geode (Microcrystalline quartz (SiO₂), commonly lining a volcanic geode cavity) — mineral

Druzy quartz geode

Microcrystalline quartz (SiO₂), commonly lining a volcanic geode cavity

Pumice (Pumice (Vesicular Felsic Igneous Rock)) — igneous

Pumice

Pumice (Vesicular Felsic Igneous Rock)

Soft Limestone (Calcite-rich Sedimentary Rock (CaCO3)) — sedimentary

Soft Limestone

Calcite-rich Sedimentary Rock (CaCO3)

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

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

Chert / Flint Jasper

Microcrystalline Quartz (SiO2)

River Pebble (Siliceous rock fragment / Quartzite / Sandstone pebble) — sedimentary

River Pebble

Siliceous rock fragment / Quartzite / Sandstone pebble

Sandstone pebble (Sandstone (arenite / quartzarenite)) — sedimentary

Sandstone pebble

Sandstone (arenite / quartzarenite)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Ferruginous Sandstone (Ferruginous Clastic Sedimentary Rock) — sedimentary

Ferruginous Sandstone

Ferruginous Clastic Sedimentary Rock

Sandstone (Arenite (primarily SiO2 - Silicon Dioxide)) — sedimentary

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

Sandstone (Ferruginous) (Arenite with Iron Oxide cement (SiO2 + Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Chert (Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Polished Marble (likely Carrara-type with Iron oxides) (Metamorphosed Carbonate (CaCO3)) — metamorphic

Polished Marble (likely Carrara-type with Iron oxides)

Metamorphosed Carbonate (CaCO3)

Red Sandstone (Arenite (Iron-rich Sandstone)) — sedimentary

Red Sandstone

Arenite (Iron-rich Sandstone)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Banded Gneiss (Gneiss (Metamorphic rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic rock)

Sandstone (Arenite (Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Sedimentary Rock)

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Sandstone (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Arenite)

Limestone with Iron Oxide Staining (Sedimentary Rock (Calcite, CaCO3)) — sedimentary

Limestone with Iron Oxide Staining

Sedimentary Rock (Calcite, CaCO3)

Sandstone (Sedimentary Rock (Quartzose Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartzose Sandstone)

Sandstone (Quartzose Sandstone (Sedimentary Rock)) — sedimentary

Sandstone

Quartzose Sandstone (Sedimentary Rock)

Sandstone (Sedimentary Rock (Quartzose Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartzose Sandstone)

Granodiorite (Phaneritic intrusive igneous rock) — igneous

Granodiorite

Phaneritic intrusive igneous rock

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Quartzite Pebble (Quartzite (SiO2-dominated rock)) — metamorphic

Quartzite Pebble

Quartzite (SiO2-dominated rock)

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Quartzite pebble (Metamorphic rock (mainly SiO2)) — metamorphic

Quartzite pebble

Metamorphic rock (mainly SiO2)

Sandstone (Ferruginous) (Clastic Sedimentary Rock (Litharenite)) — sedimentary

Sandstone (Ferruginous)

Clastic Sedimentary Rock (Litharenite)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Staurolite-bearing mica schist (probable) (Mica schist composed chiefly of muscovite/biotite, quartz, and likely staurolite or garnet) — metamorphic

Staurolite-bearing mica schist (probable)

Mica schist composed chiefly of muscovite/biotite, quartz, and likely staurolite or garnet

Basalt (Basalt (Ma-Fe Silicate)) — igneous

Basalt

Basalt (Ma-Fe Silicate)

Sedimentary Breccia (Clastic Breccia (CaCO3/SiO2 matrix)) — sedimentary

Sedimentary Breccia

Clastic Breccia (CaCO3/SiO2 matrix)

Sandstone (Banded) (Clastic Sedimentary Rock (primarily Quartz, SiO2)) — sedimentary

Sandstone (Banded)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite