Rock Identifier

Category

Synthetic Material (Not A Rock Or Mineral)

Browse synthetic material (not a rock or mineral) specimens identified by the Rock Identifier community.

Learn about Synthetic Material (Not A Rock Or Mineral) in the encyclopedia

Rock Salt

Rock Gypsum

Coral Rock

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zincite

Halite

Opalite

Lead Feldspar

Dolomite

Conglomerate (Conglomerate (a clastic sedimentary rock)) — Sedimentary

Conglomerate

Conglomerate (a clastic sedimentary rock)

Chert (Flint Nodule) (Microcrystalline and Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint Nodule)

Microcrystalline and Cryptocrystalline Quartz (SiO2)

Quartz vein rock with iron-stained matrix (Quartz (SiO₂), likely with limonite/goethite and minor feldspar or mica) — mineral

Quartz vein rock with iron-stained matrix

Quartz (SiO₂), likely with limonite/goethite and minor feldspar or mica

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Basalt (Mafic Igneous Pebble) — igneous

Basalt

Mafic Igneous Pebble

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate (Clastic Sedimentary Rock (Conglomerate)) — sedimentary

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

Granite Pebble (Granite (Felsic Plutonic Rock)) — igneous

Granite Pebble

Granite (Felsic Plutonic Rock)

Sandstone or Mudstone (Sedimentary Rock (Sandstone/Mudstone)) — sedimentary

Sandstone or Mudstone

Sedimentary Rock (Sandstone/Mudstone)

Granite (Granite (a common type of Felsic Intrusive Igneous Rock)) — Igneous Rock

Granite

Granite (a common type of Felsic Intrusive Igneous Rock)

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

Basalt (Basalt (primarily Plagioclase feldspar and Pyroxene)) — igneous

Basalt

Basalt (primarily Plagioclase feldspar and Pyroxene)

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

Quartzite (with Iron Staining)

Metamorphic Quartzite (SiO2)

Weathered quartz-rich rock, likely quartzite or quartz vein (Quartzite; predominantly quartz (SiO₂), possibly iron-oxide stained) — metamorphic

Weathered quartz-rich rock, likely quartzite or quartz vein

Quartzite; predominantly quartz (SiO₂), possibly iron-oxide stained

Tumbled blue-gray mineral specimen (Indeterminate; possibly dumortierite quartz, sodalite, or dyed stone) — mineral

Tumbled blue-gray mineral specimen

Indeterminate; possibly dumortierite quartz, sodalite, or dyed stone

Fossiliferous limestone (Calcarenite/bioclastic limestone, predominantly calcite (CaCO₃)) — sedimentary

Fossiliferous limestone

Calcarenite/bioclastic limestone, predominantly calcite (CaCO₃)

Fossil Coral in Limestone (Scleractinia (Anthomastodon or similar) in Sedimentary Calcarenite) — fossil

Fossil Coral in Limestone

Scleractinia (Anthomastodon or similar) in Sedimentary Calcarenite

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

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Lava Rock with Fabric Impression (Scoria or Basalt with anthropogenic impressions) — igneous

Lava Rock with Fabric Impression

Scoria or Basalt with anthropogenic impressions

Concrete rubble (Anthropogenic conglomerate) — sedimentary

Concrete rubble

Anthropogenic conglomerate

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4

Ferruginous Sandstone (Ironstone Conglomerate fragments) (Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)) — sedimentary

Ferruginous Sandstone (Ironstone Conglomerate fragments)

Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Serpentine / Serpentinite

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

Banded Iron Formation (Fragment) (Banded Iron Formation (BIF)) — sedimentary

Banded Iron Formation (Fragment)

Banded Iron Formation (BIF)

Peridotite (with Olivine and Pyroxene) (Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)) — igneous

Peridotite (with Olivine and Pyroxene)

Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)

Greenschist (Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)) — metamorphic

Greenschist

Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Basalt with Quartz Vein (Mafic volcanic rock with hydrothermal SiO2 filling) — igneous

Basalt with Quartz Vein

Mafic volcanic rock with hydrothermal SiO2 filling

Biotite-rich schist (mica schist) (Mica schist; predominantly biotite mica, quartz, and feldspar) — metamorphic

Biotite-rich schist (mica schist)

Mica schist; predominantly biotite mica, quartz, and feldspar

Coal (Anthracite / Bituminous Coal) — sedimentary

Coal

Anthracite / Bituminous Coal

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

Meteorite (Chondrite)

Stony Meteorite (Ordinary Chondrite)

Granite (Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)) — igneous

Granite

Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)

Likely serpentine pebble (Serpentinite; predominantly serpentine-group minerals, Mg₃Si₂O₅(OH)₄) — metamorphic

Likely serpentine pebble

Serpentinite; predominantly serpentine-group minerals, Mg₃Si₂O₅(OH)₄

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

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Chert Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule

Microcrystalline Quartz (SiO2)

Dark rounded pebble, likely basalt (Basalt (fine-grained mafic volcanic rock; commonly plagioclase, pyroxene, and olivine)) — igneous

Dark rounded pebble, likely basalt

Basalt (fine-grained mafic volcanic rock; commonly plagioclase, pyroxene, and olivine)

Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

Rhyolite (Extrusive Felsic Igneous Rock) — igneous

Rhyolite

Extrusive Felsic Igneous Rock

Quartzite (SiO2 (Metamorphosed Sandstone)) — metamorphic

Quartzite

SiO2 (Metamorphosed Sandstone)

Iron-stained quartz-rich rock, possibly quartzite or hydrothermal quartz (Quartz (SiO₂), likely with iron oxides; exact host rock uncertain from the photograph) — metamorphic

Iron-stained quartz-rich rock, possibly quartzite or hydrothermal quartz

Quartz (SiO₂), likely with iron oxides; exact host rock uncertain from the photograph

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)