Rock Identifier

Category

Not A Rock

Browse not a rock specimens identified by the Rock Identifier community.

Learn about Not A Rock in the encyclopedia

Rock Gypsum

Rock Gypsum

Rock Salt

Rock Salt

Coral Rock

Coral Rock

Asphalt Rock

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Cataclasite

Cataclasite

Anorthosite

Anorthosite

Gondite

Gondite

Peridotite

Peridotite

Epidosite

Epidosite

Phosphorite

Phosphorite

Carnelian (Carnelian (SiO2)) — mineral

Carnelian

Carnelian (SiO2)

Limonite (Iron Ore) (FeO(OH)·nH2O (Hydrous ferric oxide)) — mineral

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

Granite Water-Worn Pebble (Phaneritic Felsic Igneous Rock) — igneous

Granite Water-Worn Pebble

Phaneritic Felsic Igneous Rock

Gossan with Copper Carbonate (Chrysocolla/Malachite) (Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)) — Mineral/Sedimentary Interface

Gossan with Copper Carbonate (Chrysocolla/Malachite)

Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)

Mineral/Sedimentary Interface

Quartzite Pebble (Quartzite (mostly SiO2)) — metamorphic

Quartzite Pebble

Quartzite (mostly SiO2)

Graywacke with Quartz Veins (Argillaceous Sandstone (SiO2 composition in veins)) — sedimentary

Graywacke with Quartz Veins

Argillaceous Sandstone (SiO2 composition in veins)

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

Sandstone

Clastic Sedimentary Rock (composed primarily of Quartz, SiO2)

Sandstone (Quartzose Sandstone) (Clastic sedimentary rock (SiO2 major component)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (SiO2 major component)

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with Bioclasts) — sedimentary

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Bioclasts

Biotite (Black Mica) (Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2) — mineral

Biotite (Black Mica)

Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Shale (Shale (Consolidated fine-grained clay/silt)) — sedimentary

Shale

Shale (Consolidated fine-grained clay/silt)

Limestone (specifically Chalky Limestone) (Calcium Carbonate (CaCO3 / Calcite)) — sedimentary

Limestone (specifically Chalky Limestone)

Calcium Carbonate (CaCO3 / Calcite)

Shale (Shale (comprised mostly of clay minerals and quartz)) — sedimentary

Shale

Shale (comprised mostly of clay minerals and quartz)

Feldspar (Potassium Feldspar (KAlSi3O8)) — mineral

Feldspar

Potassium Feldspar (KAlSi3O8)

Sandstone Cobble (Arenite (Secondary classification based on grain size)) — sedimentary

Sandstone Cobble

Arenite (Secondary classification based on grain size)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Sandstone (Stream-rounded) (Arenite (SiO2 based)) — sedimentary

Sandstone (Stream-rounded)

Arenite (SiO2 based)

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

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Quartz Geode (Silicon Dioxide (SiO2) within a secondary sedimentary structure) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

Banded Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Shale (possibly Carbonaceous or Oil Shale) (Laminated Mudstone (primarily clay minerals and quartz)) — sedimentary

Shale (possibly Carbonaceous or Oil Shale)

Laminated Mudstone (primarily clay minerals and quartz)

Granite (Phaneritic Felsic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Felsic Igneous Rock (Granite)

Quartzite Pebble (Quartzite (principally SiO2)) — metamorphic

Quartzite Pebble

Quartzite (principally SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Granite (Felsic Plutonic Rock (primarily SiO2, Al2O3, K2O, Na2O)) — igneous

Granite

Felsic Plutonic Rock (primarily SiO2, Al2O3, K2O, Na2O)

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Quartzite River Rock (Metamorphic Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Metamorphic Quartzite (primarily SiO2)

Mica Schist (Mica Schist (predominantly Muscovite or Biotite sheet silicates)) — metamorphic

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite (SiO2 based typically)) — sedimentary

Sandstone

Arenite (SiO2 based typically)

Gabbro (Gabbro (mafic intrusive igneous rock)) — igneous

Gabbro

Gabbro (mafic intrusive igneous rock)

Basalt (with possible minor veining) (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt (with possible minor veining)

Basalt (Mafic Extrusive Igneous Rock)

Pink Granite (Granite (Felsic intrusive igneous rock)) — igneous

Pink Granite

Granite (Felsic intrusive igneous rock)

Granite (River-worn Pebble) (Phaneritic Igneous Rock (Granitic composition)) — igneous

Granite (River-worn Pebble)

Phaneritic Igneous Rock (Granitic composition)

Basalt River Pebble (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt River Pebble

Basalt (Mafic Extrusive Igneous Rock)

Gray Basalt (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Gray Basalt

Basalt (Mafic Extrusive Igneous Rock)

Basalt (with possible mineral veining) (Basalt (Aphanitic Mafic Igneous Rock)) — Igneous

Basalt (with possible mineral veining)

Basalt (Aphanitic Mafic Igneous Rock)

Vesicular Basalt (River Stone) (Basalt (Aphanitic-Vesicular Mafic Rock)) — igneous

Vesicular Basalt (River Stone)

Basalt (Aphanitic-Vesicular Mafic Rock)

Granite (Phaneritic Felsic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Felsic Igneous Rock (Granite)