Rock Identifier

Category

Metamorphic Rock

Browse metamorphic rock specimens identified by the Rock Identifier community.

Basalt with Quartz Veins (Basalt (composition: SiO2, MgO, FeO, Al2O3, CaO)) — igneous

Basalt with Quartz Veins

Basalt (composition: SiO2, MgO, FeO, Al2O3, CaO)

Porphyritic Basalt (Basalt (with plagioclase phenocrysts)) — igneous

Porphyritic Basalt

Basalt (with plagioclase phenocrysts)

Marble (Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)) — metamorphic

Marble

Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)

Muscovite Mica (Muscovite - KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2

Muscovite Mica (with Quartz matrix) (Muscovite - KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica (with Quartz matrix)

Muscovite - KAl2(AlSi3O10)(OH)2

Epidote in Quartz (Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) in Milky Quartz (SiO2)) — metamorphic

Epidote in Quartz

Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) in Milky Quartz (SiO2)

Olivine (Peridotite) ((Mg, Fe)2SiO4 (Magnesium Iron Silicate)) — igneous

Olivine (Peridotite)

(Mg, Fe)2SiO4 (Magnesium Iron Silicate)

Porphyritic Rhyolite (Rhyolite (Porphyritic texture)) — igneous

Porphyritic Rhyolite

Rhyolite (Porphyritic texture)

Concrete Paver (Artificial Cementitious Rock) (Hydrated Portland Cement Aggregate) — Sedimentary (Synthetic)

Concrete Paver (Artificial Cementitious Rock)

Hydrated Portland Cement Aggregate

Sedimentary (Synthetic)

Basalt (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Basalt (Basalt (Igneous Volcanic Rock)) — igneous

Basalt

Basalt (Igneous Volcanic Rock)

Basalt (Extrusive mafic rock (Basalt)) — igneous

Basalt

Extrusive mafic rock (Basalt)

Basalt (Beach Pebble) (Extrusive mafic volcanic rock) — igneous

Basalt (Beach Pebble)

Extrusive mafic volcanic rock

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt Pebble (Aphanitic Mafic Igneous Rock) — igneous

Basalt Pebble

Aphanitic Mafic Igneous Rock

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Vesicular Basalt (Extrusive mafic igneous rock) — igneous

Vesicular Basalt

Extrusive mafic igneous rock

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Basalt (Extrusive Mafic Igneous Rock) — igneous

Basalt

Extrusive Mafic Igneous Rock

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt River Pebble (Basalt (Mafic volcanic rock)) — igneous

Basalt River Pebble

Basalt (Mafic volcanic rock)

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

Basalt (River Pebble)

Extrusive Mafic Igneous Rock

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — Igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Muscovite Mica (Granitic Pegmatite) (Muscovite - KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica (Granitic Pegmatite)

Muscovite - KAl2(AlSi3O10)(OH)2

Rough Ruby (Corundum) in Zoisite Matrix (Al2O3 (Aluminum Oxide) with Ca2Al3(SiO4)3(OH)) — mineral

Rough Ruby (Corundum) in Zoisite Matrix

Al2O3 (Aluminum Oxide) with Ca2Al3(SiO4)3(OH)

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions (Quartzite)) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions (Quartzite)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Gold-Bearing Quartz (Silicon Dioxide with Native Gold (SiO2 + Au)) — mineral

Gold-Bearing Quartz

Silicon Dioxide with Native Gold (SiO2 + Au)

Rhodonite (Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

River Rock (Quartz-dominated) (Silicon Dioxide (SiO2) mixture with varied clastic sediments) — sedimentary (alluvial deposit)

River Rock (Quartz-dominated)

Silicon Dioxide (SiO2) mixture with varied clastic sediments

sedimentary (alluvial deposit)

Cockle Shell (Fossil or Recent) (Class Bivalvia, Family Cardiidae (e.g., Cerastoderma edule for common cockle)) — Sedimentary (Biogenic, a type of fossil)

Cockle Shell (Fossil or Recent)

Class Bivalvia, Family Cardiidae (e.g., Cerastoderma edule for common cockle)

Sedimentary (Biogenic, a type of fossil)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Almandine Garnet (Iron aluminum silicate - Fe3Al2(SiO4)3) — metamorphic

Almandine Garnet

Iron aluminum silicate - Fe3Al2(SiO4)3

Pink Jade (Dyed Quartzite) (Silicon Dioxide (SiO2) - primarily Quartzite or Quartz) — metamorphic

Pink Jade (Dyed Quartzite)

Silicon Dioxide (SiO2) - primarily Quartzite or Quartz

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Iolite (Cordierite) (Cordierite (Magnesium iron aluminum cyclosilicate), Mg2Al4Si5O18) — metamorphic

Iolite (Cordierite)

Cordierite (Magnesium iron aluminum cyclosilicate), Mg2Al4Si5O18

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)